Return values in Javascript - Mini Project: Build & Apply

Return values

📖 Scenario: You are creating a simple calculator function that adds two numbers and returns the result.

🎯 Goal: Build a function that takes two numbers, adds them, and returns the sum. Then display the result.

📋 What You'll Learn

Create a function named addNumbers that takes two parameters: a and b.

Inside the function, return the sum of a and b.

Call the function with the numbers 5 and 7 and store the result in a variable named result.

Print the value of result to the console.

💡 Why This Matters

🌍 Real World

Functions that return values are used everywhere in programming to calculate results, process data, and send back answers.

💼 Career

Understanding return values is essential for writing reusable code and building software that works correctly and efficiently.

1

Create the function addNumbers

Write a function named addNumbers that takes two parameters: a and b. Do not write the function body yet.

Javascript

function addNumbers(a, b) {
  // Your code here
}

Need a hint?

Use the function keyword followed by the name addNumbers and parameters a, b.

2

Add a return statement to addNumbers

Inside the addNumbers function, write a return statement that returns the sum of a and b.

Javascript

function addNumbers(a, b) {
  // Your code here
}

Need a hint?

Use return a + b; to send back the sum.

3

Call addNumbers and store the result

Call the function addNumbers with arguments 5 and 7. Store the returned value in a variable named result.

Javascript

function addNumbers(a, b) {
  return a + b;
}

// Your code here

Need a hint?

Use const result = addNumbers(5, 7); to call and save the sum.

4

Print the result

Print the value of the variable result to the console using console.log.

Javascript

function addNumbers(a, b) {
  return a + b;
}

const result = addNumbers(5, 7);

// Your code here

Need a hint?

Use console.log(result); to show the sum in the console.