factorial function c code example

Example 1: factorial c program using for loop

#include<stdio.h>
int main(){
  int i,f=1,num;
 
  printf("Enter a number: ");
  scanf("%d",&num);
 
  for(i=1;i<=num;i++)
      f=f*i;
 
  printf("Factorial of %d is: %d",num,f);
  return 0;
}

Example 2: factorial of a given number in c

//Factorial of a given number
#include <stdio.h>

//This function returns factorial of the number passed to it 
long int factorialOf(int number){
    long int factorial = 1;
    while(number){
        factorial*=number;
        number-=1;
    }
    return factorial;
}

int main(void) {
	int n;
	printf("Find factorial of \n");
	scanf("%d",&n);
	printf("\nThe factorial of %d is %ld",n,factorialOf(n));
	return 0;
}

Example 3: c code factorial function

#include <stdio.h>
 
int fact(int);
 
void main()
{
 int no,factorial;
 
  	printf("Enter a number to calculate it's factorial\n");
  	scanf("%d",&no);
  	factorial=fact(no);
    printf("Factorial of the num(%d) = %d\n",no,factorial);
//printf("Factorial of the num(%d) = %d\n",no,fact(no));//another way of calling a function//comment above two lines if you want to use this
}
 
int fact(int n)
{
    int i,f=1;
    for(i=1;i<=n;i++)
    {
        f=f*i;
    }
    return f;
}