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<div style="font-size:30px">'''IS FUNCTIONS'''</div><br/>
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<div style="font-size:30px">'''ISFUNCTIONS(n)'''</div><br/>
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*<math>n</math> is the number
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Syntax
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==Description==
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"This function isa group of Information Functions that can be used to find out information about a specific.The IS FUNCTION is also known as data information functions, data inspection functions or data-testing functions.These functions are simple data validation and data type checking functions.The IS FUNCTIONS are listed below:
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ISARRAY(n)
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ISLEAPYEAR(n)
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ISBLANK(n)
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ISERR(n)
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ISERROR(n)
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ISLOGICAL(n)
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ISNA(n)
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ISNONTEXT(n)
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ISREF(n)
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ISTEXT(n)
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ISPMT(n)
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ISEMPTY(n)
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ISNULL(n)
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ISEVEN(n)
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ISODD(n)
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ISPRIME(n), where n is value to check with the  function.The n can be any type like emptycell, boolean values,text,nontext,number,referencevalue or name referring to any of these.this function will give the result as either TRUE or FALSE according to the n value. This function will not convert any numbers from  text. For e.g. ""20"" is normally converted as a number 20. But in ISNUMBER(""20"") will return FALSE, because ""20"" will not convert in to number."
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</div></div>
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These are the nine worksheet functions used for testing the type of a value or reference.The function displays 1 or 0 depending on the outcome.
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<div id="2SpaceContent" align="left"><div class="ZEditBox" align="justify">
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Examples-1
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*=ISLOGICAL(TRUE) is 1
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*=ISLOGICAL(“TRUE”) is 0*
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*=ISNUMBER(4) is 1
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</div></div>
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<div id="8SpaceContent" align="left"><div class="ZEditBox" align="justify">'''<font face="Times New Roman">''''''''''''<font size="6"> </font>''' '''''''''</font>'''</div></div>
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<div id="11SpaceContent" align="left"><div class="ZEditBox mceEditable" align="justify">
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<font size="5">Description</font>
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'''ISBLANK'''
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'''V'''
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'''ISERR'''
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'''V'''
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'''ISERROR'''
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'''V'''
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'''ISLOGICAL'''
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'''ISNA'''
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'''ISNONTEXT'''
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'''ISNUMBER'''
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'''ISREF'''
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'''ISTEXT'''
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</div></div>
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*ISBLANK  
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V refers to an empty cell.
<div id="5SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify"> <font color="#484848"><font face="Arial, sans-serif"><font size="2">These are the nine worksheet functions used for testing the type of a value or reference.The function displays 1 or 0 depending on the outcome.</font></font></font></div></div>
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*ISERR
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Vl refers to any error value except #N/A.
<div id="10SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify"><font size="6">IS FUNCTIONS</font></div></div>
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*ISERROR
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V refers to any error value  
<div id="9SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify"> 
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*ISLOGICAL
 
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V refers to a logical value.
<font color="#484848"><font face="Arial, sans-serif"><font size="2"><nowiki>=ISLOGICAL(TRUE) is 1</nowiki></font></font></font>
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*ISNA
 
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V refers to the NaN error value.
<font color="#484848"><font face="Arial, sans-serif"><font size="2"><nowiki>=ISLOGICAL(“TRUE”) is 0</nowiki></font></font></font>
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*ISNONTEXT
 
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V refers to any item that is not text.
<font color="#484848"><font face="Arial, sans-serif"><font size="2"><nowiki>=ISNUMBER(4) is 1</nowiki></font></font></font>
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*ISNUMBER
 
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V refers to a number.
</div></div>
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*ISREF
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V refers to a reference.
<div id="12SpaceContent" class="zcontent" align="left">
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*ISTEXT  
 
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V refers to text.</font></font>
{| id="TABLE1" class="SpreadSheet blue"
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|- class="even"
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| class=" " |
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| Column1
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| Column2
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| Column3
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| Column4
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|- class="odd"
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| class=" " | Row1
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| class="sshl_f" | 1
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| class="SelectTD                sshl_f sshl_t ChangeBGColor" |
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| class=" sshl_t" |
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| class=" sshl_t" |
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|- class="even"
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| class="  " | Row2
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| class="sshl_f" | 0
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| class="f52543                sshl_t" |
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| class=" sshl_t" |
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| class=" sshl_t" |
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|- class="odd"
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| Row3
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| class="sshl_f" | 1
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| class=" sshl_t" |
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| class=" sshl_t" |
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| class=" sshl_t" |
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|- class="even"
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| Row4
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| class="                                                                                            " |
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|
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|
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|
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|- class="odd"
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| class=" " | Row5
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|
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|
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|
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|
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|- class="even"
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| Row6
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|
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|
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|
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|
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|}
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<div align="left">[[Image:calci1.gif]]</div></div>
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<div id="6SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify"> <font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISBLANK'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)<br /></font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISERR'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)<br /></font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISERROR'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)<br /></font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISLOGICAL'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)<br /></font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISNA'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)<br /></font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISNONTEXT'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)<br /></font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISNUMBER'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)<br /></font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISREF'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)<br /></font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''ISTEXT'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">(</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">'''V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">)</font></font></font>
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<font color="#484848"><font face="Arial, sans-serif"><font size="2">'''where V'''</font></font></font><font color="#484848"><font face="Arial, sans-serif"><font size="2">   is the value that is to bet tested. </font></font></font>
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<br /><br />
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{| width="587" cellpadding="1"
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|- valign="bottom"
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| width="78" bgcolor="#ffffff" |
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<center><font color="#000000"><font face="Tahoma, sans-serif"><font size="1">'''Function'''</font></font></font></center>
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| width="505" bgcolor="#ffffff" |
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<center><font color="#000000"><font face="Tahoma, sans-serif"><font size="1">'''Shows 1 if '''</font></font></font></center>
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|-
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| width="78" valign="top" |
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<br />
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| width="505" |
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<br />
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISBLANK</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">V refers to an empty cell.</font></font>
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISERR</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">Vl refers to any error value except #N/A.</font></font>
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISERROR</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">V refers to any error value </font></font>
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISLOGICAL</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">V refers to a logical value.</font></font>
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISNA</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">V refers to the NaN error value.</font></font>
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISNONTEXT</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">V refers to any item that is not text. </font></font>
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISNUMBER</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">V refers to a number.</font></font>
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISREF</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">V refers to a reference.</font></font>
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|- valign="top"
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| width="78" |
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<font face="Tahoma, sans-serif"><font size="1">ISTEXT</font></font>
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| width="505" |
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<font face="Tahoma, sans-serif"><font size="1">V refers to text.</font></font>
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|}
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<br />
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</div></div>
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<div id="1SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify">
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Examples-2
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</div></div>
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<div id="4SpaceContent" class="zcontent" align="left">
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{| id="TABLE3" class="SpreadSheet blue"
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|- class="even"
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| class="              " |
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<div id="4Space_Copy" title="Click and Drag over to AutoFill other cells."></div>
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| Column1
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| Column2
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| Column3
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| Column4
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|- class="odd"
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| class=" " | Row1
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| class="sshl_f " | Welcome
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| class="sshl_f" | 0
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| class="sshl_f" | sav123
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| class="sshl_f" | 1
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|- class="even"
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| class="  " | Row2
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| class="sshl_f" | NaN
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| class="sshl_f" | 0
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| class="                                              sshl_f  " |
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|
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|- class="odd"
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| Row3
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| class="                                                                                                              sshl_f  " |
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|- class="even"
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| Row4
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| class="SelectTD  SelectTD" |
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|- class="odd"
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| class=" " | Row5
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|- class="even"
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| Row6
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|}
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<div align="left">[[Image:calci1.gif]]</div></div>
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----
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<div id="7SpaceContent" class="zcontent" align="left"> 
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<font color="#484848"><font face="Arial, sans-serif"><font size="2">Let's see another example in Column1Row1</font></font></font>
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<font color="#484848"><font face="Arial, sans-serif"><font size="2">Let C1R1 = Welcome</font></font></font>
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<font color="#484848"><font face="Arial, sans-serif"><font size="2"><nowiki>=ISBLANK(C1R1) is 0</nowiki></font></font></font>
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<font color="#484848"><font face="Arial, sans-serif"><font size="2">Let C3R1 = sav123</font></font></font>
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<font color="#484848"><font face="Arial, sans-serif"><font size="2"><nowiki>=ISTEXT(C3R1) is 1</nowiki></font></font></font>
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<font color="#484848"><font face="Arial, sans-serif"><font size="2">///rly C1R2 = NaN</font></font></font>
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<font color="#484848"><font face="Arial, sans-serif"><font size="2"><nowiki>=ISERR(C1R2) is 0</nowiki></font></font></font>
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</div>
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