WAP using a function “fact()” to calculate factorial of a given number. Take the number as an input from the user.

#include<stdio.h>

#include<math.h>

int main()

{

    int a,b;

    printf("Enter the number = ");

    scanf("%d",&a);

    b=factorial(a);

    printf("factorial value of %d is %d ",a,b);

}

int factorial(int x)

{

    int i,j;

    j=1;

    for(i=x;i>=1;i--)

    {

        j=i*j;

    }

    return j;

}