Build a String in a Loop

Lab Java Beginner 10 points

Read n and print the numbers 1 to n joined by commas, using a StringBuilder.

Input

One integer ≥ 1.

Output

One line, e.g. 1,2,3.

Example

Input

Output

1,2,3,4,5

Sample input available Sample output available

Editor

Java

Hints

Add the comma before every number except the first.

Solution explanation

Concatenating Strings with + inside a loop creates a new String each time; StringBuilder avoids that.

Show solution

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        StringBuilder sb = new StringBuilder();
        for (int i = 1; i <= n; i++) {
            if (i > 1) {
                sb.append(',');
            }
            sb.append(i);
        }
        System.out.println(sb);
    }
}

Output

Answer