📖 INDEX
LOADING ENGINE...
JS Function Declaration
Learn how to define reusable logic blocks in JavaScript.
declaration.js1 / 3
⚙️
Visualizing Scope...
Tutor: A Function Declaration starts with the 'function' keyword, followed by a name. It allows you to group code to be reused later.
JS Fundamentals
Basic Syntax
A function declaration is a named function that can be called anywhere in its scope.
function calculateArea(width, height) {
return width * height;
}
Code Analysis
Does a function declaration need a name?
Achievements
🧙♂️
Syntax Wizard
Declare a valid function with parameters and return.
🎈
Hoisting Expert
Understand how functions are moved to the top.
🏗️
Logic Architect
Master function calls and execution flow.
Glossary & Best Practices
Hoisting
The JavaScript engine hoists function declarations to the top of the script, allowing them to be invoked before their definition line.
Return Statement
Specifies the value to be returned to the function caller. If omitted, the function returns undefined.