Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Learn Returning Values from Functions | Functions in JavaScript
Introduction to JavaScript
course content

Course Content

Introduction to JavaScript

Introduction to JavaScript

1. JavaScript Fundamentals
About JavaScriptUnderstanding JavaScript SyntaxChallenge: Console Output in JavaScriptUsing Comments to Document CodeChallenge: Write a Single-Line CommentChallenge: Write a Multi-Line Comment
2. Variables and Data Types in JavaScript
Understanding Variables in JavaScriptChallenge: Define the VariableUsing const for ConstantsExploring JavaScript Data TypesWorking with null in JavaScriptIntroduction to ArraysArray Methods and ManipulationChallenge: Perform Array Operations
3. Performing Operations in JavaScript
Understanding Assignment OperatorsMathematical Operations in JavaScriptAssignment Operators in JavaScriptIncrement and Decrement OperatorsChallenge: Variable Operations PracticeComparison Operators in JavaScriptLogical Operators ExplainedChallenge: Compare Variables in JavaScriptConcatenating Strings in JavaScriptChallenge: Build Sentences with JavaScript
4. Controlling Program Flow with Conditional Statements
Mastering if Statements in JavaScriptUsing else for Alternative OutcomesApplying else if for Multiple ConditionsChallenge: Determine Sizes with Conditionals
5. Looping Through Data in JavaScript
Understanding the while Loop in JavaScriptUsing the do while Loop for IterationChallenge: Print Numbers from 5 to 9Mastering the for Loop in JavaScriptChallenge: Console Tigers with LoopsBreaking Out of Loops with breakSkipping Iterations with continueChallenge: Stop and Skip in Loops
6. Functions in JavaScript
What Are Functions in JavaScript?Defining Functions in JavaScriptChallenge: Write a Function – My NameUsing Function Arguments EffectivelyReturning Values from FunctionsChallenge: Create a Sum FunctionCourse Summary & Next Steps

book
Returning Values from Functions

The primary purpose of a function is to return a value.

The function's space is deleted after its execution, and you rarely output information directly from the function to the console.

The return keyword is used to perform the value return operation, and it signifies the end of the function's execution:


              
1234567

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

let sum = add(25, 30);

console.log("sum =", sum);
copy

In the example above, you can see that the function call (add(25, 30)) is replaced by the value 55 (25 + 30) after the return keyword.

Note

The function completes its execution and returns a value at the point of call, and the function's space is cleared.

It's also essential to understand that the return keyword terminates the execution of the function. Any code after the return statement will not be executed:


              
1234567891011

            
function add(a, b) {
  return a + b;
  console.log("Two numbers added");
  console.log("Two numbers added");
  console.log("Two numbers added");
  console.log("Two numbers added");
}

let numb = add(25, 12);

console.log("numb =", numb);
copy

The console.log() statements after the return statement were not executed.

question mark

What does the return keyword do inside a JavaScript function?

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 6. ChapterΒ 5
We're sorry to hear that something went wrong. What happened?
some-alt