9.Factorial using while loop

 #include<stdio.h>

int main(){

    int n,i=1;

    int factorial=1;

    printf("enter a number :\n");

    scanf("%d",&n);

    while(i<=n)

    {

    factorial=factorial*i;

    i++;

    }

    printf("The fctorial of %d is :%d",n,factorial);

    return 0;

}