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  1. import java.util.*;
  2.  
  3. class Main {
  4.     public static int sum(int n) {
  5.         if (n == 0) {
  6.             return 0;
  7.         } else {
  8.             return n + sum(n - 1);
  9.         }
  10.     }
  11.  
  12.     public static void main(String[] args) {
  13.         Scanner input = new Scanner(System.in);
  14.  
  15.         int n = input.nextInt();
  16.  
  17.         int result = sum(n);
  18.         System.out.println("The sum of numbers from 0 to " + n + " is: " + result);
  19.     }
  20. }
  21.  
Success #stdin #stdout 0.16s 60980KB
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stdin
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5
stdout
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The sum of numbers from 0 to 5 is: 15
https://ideone.com/uhoULh
language:
Java (HotSpot 12)
created:
15 days ago
visibility:
public

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