Find the Factorial of a Number: C

This video tutorial illustrates finding factorial of a given number using C programming.

In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n.

Ex:
if user enters 5, then the factorial is 1 * 2 * 3 * 4 * 5 i.e., factorial = 120
This logic must be handled with a c program.

Full Source Code

#include 
#include 

void main()
{
 int num, i, fact = 1;
 clrscr();

 printf("Enter a number\n");
 scanf("%d", &num);

 for( i = 1; i 
Here the for loop stars from 1 and not 0. As anything multiplied by 0 would also be zero.
 
Note: Factorial of 0 is 1. i.e., 0! = 1
 
 

 

fact *= i; is the compact representation of fact = fact * i;
 
Video Tutorial: Factorial in c


 
  
YouTube Link: https://www.youtube.com/watch?v=PYLaSrO84nU [Watch the Video In Full Screen.]
 



 
Output:

Enter a number

5

Factorial of 5 is 120
 
Also Watch/Read: Find the Factorial of a Number: C++
 
 
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