Difference between revisions of "Manuals/calci/FACTORIAL"

Revision as of 15:50, 8 March 2017

FACTORIAL (Number)

This function is showing the result of factorial of a number.
Factorial means the result of multiplying a sequence of descending natural numbers down to 1.
In $FACTORIAL(Number)$ , $Number$ is any positive integer.
So the factorial $n!$ is defined for a positive integer n as:

Failed to parse (syntax error): {\displaystyle n!=n(n-1)...2·1} .

For example 4!=4*3*2*1 = 24.
The given number will truncated to integer if the given number is in Decimal.
This function will returns the result as NaN when the given number is in negative.

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-FACT
+<div style="font-size:30px">'''FACTORIAL (Number)'''</div><br/>
+*<math>Number</math> is any positive integer.
+==Description==
+*This function is showing the result of factorial of a number.
+*Factorial means the result of multiplying a sequence of descending natural numbers down to 1.
+*In <math>FACTORIAL (Number)</math>,<math>Number</math> is any positive integer.
+*So the factorial <math>n!</math> is defined for a positive integer n as:
+<math>n!=n(n-1)...2·1</math>.
+*For example 4!=4*3*2*1 = 24.
+*The given number will truncated  to integer if the given number is in Decimal.
+*This function will returns the result as NaN when the given number is in negative.
+==Examples==
+#FACTORIAL(9) = 362880
+#FACTORIAL(4.3) = 24
+#FACTORIAL(54) = 2.308436973392414e+71
+#FACTORIAL(-3) = NaN
+==See Also==
+*[[Manuals/calci/FACTDOUBLE | FACTDOUBLE]]
+==References==
+*[http://en.wikipedia.org/wiki/Factorial Factorial]