C PROGRAM EXAMPLE FOR FACTORIAL:
What is factorial of a number?
- Factorial is denoted by the symbol ‘!’. For example, factorial of a number 4 is denoted as 4!. Factorial of a number is defined as the product of “the number and all integers less than that number except zero and negative integers”.
- Natural numbers ( non-negative integers ) which are greater than zero are used for factorial concept.
Factorial Example:
Zero factorial (0!) = 1
one factorial (1!) = 1
Two factorial (2!) = 2*1 = 2
Three factorial (3!) = 3*2*1 = 6
Four factorial (4!) = 4*3*2*1 = 24
Five factorial (5!) = 5*4*3*2*1 = 120
etc…
one factorial (1!) = 1
Two factorial (2!) = 2*1 = 2
Three factorial (3!) = 3*2*1 = 6
Four factorial (4!) = 4*3*2*1 = 24
Five factorial (5!) = 5*4*3*2*1 = 120
etc…
The common mathematical formula for finding factorial of the number ‘n’ is given below.
n! = n ( n – 1)( n – 2)( n – 3) …… (1)
EXAMPLE C PROGRAM FOR FACTORIAL:
OUTPUT OF C PROGRAM FOR FACTORIAL:
Please enter a number to find factorial : 7
Entered number is 7 and it’s factorial (7!) is 5040 |
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