Write a c program to take input from user and find the factorial

C Code

#include <stdio.h>
#include <conio.h>
#include <math.h>
void main()
{

  int i, number, factorial =1;

  printf("Enter number : ");
  scanf("%d",&number);

  if(number<0)
    printf("error:negative number");

  else if(number==0)
    printf("factorial of 0 i 1");

  else{
    for (i=1; i<=number; i++)
      factorial*=i;
      printf("factorial is of %d is %d",number, factorial);
  }

  getch();
}

Output