6.6 - Array Example – Sum of Elements
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What is an array in Java?
💡 Hint: Think about how an array stores data.
How do you declare an array in Java?
💡 Hint: Remember the syntax we discussed!
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the output of the following code: int[] arr = {10, 20, 30}; int sum = 0; for (int num : arr) { sum += num; } System.out.println(sum);?
💡 Hint: Add the values of the numbers in the array.
True or False: The index of the first element in an array starts at 1.
💡 Hint: Remember how indexing works in programming.
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
Write a program that creates an array of your five favorite food items and then displays a message that combines all of them together.
💡 Hint: Remember how to use loops to go through each item of the array.
Create an array of ten random numbers, sum them, and then find the average. Include error checks for ensuring all numbers are valid.
💡 Hint: Use a method to validate the numbers and another to calculate both sum and average.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.