Q. WAF to print Factorial of any entered no.

#include<conio.h>
#include<iostream.h>
float factorial(float x);
void main()
{ clrscr();
  float x,z;
  cout<<"Enter a no. ";
  cin>>x;
  z=factorial(x);
  cout<<"Factorial of "<<x<<" is "<<z;
  getch();
}
float factorial(float x)
{ float z=1;
  for (int i=x;i>=1;i--)
    { z=z*i;
    }
  return (z);
}