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Arrays and Array Operations

Explore how to use arrays in Java to build a Healthy Meals Tracker. Learn to store meal names and calories, loop through arrays for totals, and develop projects that organize and analyze nutrition data effectively.

The project

You’ve decided to start eating healthier and want to track the meals you eat each day. Instead of typing one meal at a time and losing track, you want a system that can:

  • Store the meal names (Breakfast, Lunch, Dinner, Snacks).

  • Store the calories for each meal.

  • Calculate your daily total.

  • Add everything up for the week.

Typing just:

Breakfast: 400
Lunch: 600

It is helpful, but it doesn’t give you the full picture. What you need is an array, a way to organize multiple values together so you can calculate and analyze them ...

Java 21
int[] calories = {400, 600, 300}; // A list of meal calories for the day
String[] meals = {"Breakfast", "Lunch", "Dinner"}; // A list of meal names

You can access items in an array, ...