class Factorial 
{ 
  public static void main(String ar[]) 
  { 
    int a,k,f=1; 

    a=Integer.parseInt(ar[0]); 
    
    for(k=1;k<=a;k++) 
    { 
      f=f*k; 
    } 
  System.out.println("Factorial ="+f); 
  } 
}  
           

Output: