Java bootcamp · Lab 50

Sum an 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 sum.

Examples

Example 1
Input
3
1 2 3
Output
6
Hint
  1. long sum = 0; loop
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();
    long sum = 0;
    for (int i = 0; i < n; i++) sum += in.nextInt();
    System.out.println(sum);
  }
}
Main.javaJava 21 · javac · Ctrl + Enter runs
ResultIdle
Run to see output. Check grades the tests.