write a C program to calculate factorial of a user input number using for loop.

#include<stdio.h>
#include<conio.h>
     void main()
     {
     int fac , n , i = 1;
     clrscr();
     printf("Enter the number");
     scanf("%d",&n);
     fac = 1;
     for(i = 1; i< = n; i++)
         {
           fac = fac * i;
          }
      printf("\n factorial of %d is %d", n,  fac);
      getch();
}