Question

factorial of number

Answer 1

http://learn.onlinegdb.com/c_program_find_factorial_number

this may help.

Comments

Important notice is that with the int type of variables program can give a factorial only for numbers from 0 to 12.

Answer 2

#include <stdio.h>

int main()

{

int a;

int b,c;

printf("Enter a number: ");

scanf("%d", &a);

c=a;

if(a==0)

{

printf("Factorial %d = 1 \n",a);

}

     if(a<0)

printf("Factorial of negative number doesn't exists.\n");

     if(a>0)

    {

      b=1;

    while(a>0)

    {

    

      b= b*a;

    a--;

     }

    printf("Factorial of %d = %d\n",c,b );

   }

}

Answer 3

#include <stdio.h>
long int multiplyNumbers(int n);

int main()
{
    int n;
    printf("Enter a positive integer: ");
    scanf("%d", &n);
    printf("Factorial of %d = %ld", n, multiplyNumbers(n));
    return 0;
}
long int multiplyNumbers(int n)
{
    if (n >= 1)
        return n*multiplyNumbers(n-1);
    else
        return 1;
}

Answer 4

#include <stdio.h>
int fact(int n)
{
    if(n==0)
    return 1;
    else if(n==1)
    return 1;
    else
    return n*fact(n-1);
}
int main()
{
    printf("ENter a num\t");
    int n;
    scanf("%d",&n);
    int p=fact(n);
    printf("Fact =%d",p);
   
}