fork download 
  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10.  
  11. public static double pow(double x, int n) {
  12.     if(n == 0)
  13.         return 1;
  14.     double y = 1;
  15.     while (n > 1) {
  16.         if (n%2 == 1) {
  17.             y *= x;
  18.         }
  19.         x *= x;
  20.         n /= 2;
  21.     }
  22.     return x*y;
  23. }	
  24.  
  25.  
  26. 	public static void main (String[] args) throws java.lang.Exception
  27. 	{
  28. 		System.out.println(pow(2.0, 0));
  29. 		System.out.println(pow(2.0, 1));
  30. 		System.out.println(pow(2.0, 2));
  31. 		System.out.println(pow(2.0, 3));
  32. 		System.out.println(pow(2.0, 4));
  33. 		System.out.println(pow(2.0, 5));
  34. 	}
  35. }
Success #stdin #stdout 0.1s 320512KB
comments (?)
stdin 
Standard input is empty
stdout 
1.0
2.0
4.0
8.0
16.0
32.0
https://ideone.com/qgccSg
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!