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)...2·1</math>.  
+
<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.

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:

.

  • 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

  1. FACTORIAL(9) = 362880
  2. FACTORIAL(4.3) = 24
  3. FACTORIAL(54) = 2.308436973392414e+71
  4. FACTORIAL(-3) = NaN

See Also

References