Difference between revisions of "Manuals/calci/FACTORIAL"
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*In <math>FACTORIAL (Number)</math>,<math>Number</math> is any positive integer. | *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: | *So the factorial <math>n!</math> is defined for a positive integer n as: | ||
| − | <math>n!=n(n-1)... | + | <math>n!=n*(n-1)*...2*1</math>. |
*For example 4!=4*3*2*1 = 24. | *For example 4!=4*3*2*1 = 24. | ||
*The given number will truncated to integer if the given number is in Decimal. | *The given number will truncated to integer if the given number is in Decimal. | ||
Revision as of 15:51, 8 March 2017
FACTORIAL (Number)
- is any positive integer.
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 , is any positive integer.
- So the factorial is defined for a positive integer n as:
,
is defined for a positive integer n as:.
.
- 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