Factorial (using loops)

 FACTORIAL {using loops}

USING {FOR LOOPS} 

#include<stdio.h>
#include<conio.h>
void main()
{
    int n,i,fact=1;
    printf("enter numbers = ");
    scanf("%d",&n);
    for(i=n;i>=1;i--)
    {
        (fact=fact*i);
    }
    {
        printf("%d",fact);
    }
    getch();
}

Output 

enter numbers = 5

120

USING {WHILE LOOPS} 

#include<stdio.h>
#include<conio.h>
void main()
{
    int n,fact=1;
    printf("enter numbers = ");
    scanf("%d",&n);
    while(n>0)
    {
        (fact=fact*n);
        n--;
    }
    {
        printf("%d",fact);
    }
    getch();
}

Output

enter numbers = 5
120