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#include<stdio.h>
 
int fact(int f)
{
 
if( f==1 || f==0)
{ return 1; }
else
{
f=f*fact(f-1);
return f;
}
 
}
 
 
main()
{
int num; 
int factorial;
 
printf(" Enter the number whose factorial needs to be found: ");
scanf(" %d ", &num);
 
factorial=fact(num);
 
printf("\n The factorial of %d is %d. ",num,factorial);
 
}