Java bootcamp · Lab 45

Reverse array

easyArrays10 minLesson: Arrays

Read the question, write Java on the right, then Run or Check.

QuestionHint and solution stay closed until you open them

Read n then n ints; print reversed space-separated.

Examples

Example 1
Input
3
1 2 3
Output
3 2 1
Hint
  1. Loop from n-1 down to 0.
Show correct code

Peek only after you have tried. You can still Check your own version.

import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int n = in.nextInt();
    int[] a = new int[n];
    for (int i = 0; i < n; i++) a[i] = in.nextInt();
    for (int i = n - 1; i >= 0; i--) {
      if (i < n - 1) System.out.print(' ');
      System.out.print(a[i]);
    }
    System.out.println();
  }
}
Main.javaJava 21 · javac · Ctrl + Enter runs
ResultIdle
Run to see output. Check grades the tests.