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*where, <math>N</math> is a non-negative number whose factorial is to be found.
*where, <math>N</math> is a non-negative number whose factorial is to be found.
FACT() calculates the factorial of a number '''N''' as 1*2*.....*N.
FACT() calculates the factorial of a number <math>N</math> as 1*2*.....*<math>N</math>.
== Description ==
== Description ==
e.g. FACT(3) displays '''6''' as a result.
e.g. FACT(3) displays '''6''' as a result.
*The factorial of a number '''N''' is the product of all positive integers, less than or equal to '''N'''. It is calculated as -
*The factorial of a number <math>N</math> is the product of all positive integers, less than or equal to <math>N</math>. It is calculated as -
<math>N! = N X (N-1) X (N-2) X ..... 1</MATH>
<math>N! = N X (N-1) X (N-2) X ..... 1</math>
*<math>N</math> should be a positive integer. Else Calci displays #NUM error message.
*<math>N</math> should be a positive integer. Else Calci displays #N/A error message.
*If <math>N</math> is not an integer, it is truncated to calculate the factorial.
*If <math>N</math> is not an integer, it is truncated to calculate the factorial.
*The factorial of series of numbers can be calculated as -
*The factorial of series of numbers can be calculated as -