Programming in C to find the factorial of given number

#include<stdio.h>
#include<conio.h>
void main()
{
int a,fact=1;
clrscr();
printf("\nEnter a number :");
scanf("%d",&a);
while (a>=1)
{
printf(" %d *",a);
fact=fact*a;
a--;
}
printf(" = %d",fact);
printf("\n Factorial of given number is %d",fact);
getch();
}