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Learn Defining Functions in JavaScript | Functions in JavaScript
Introduction to JavaScript
course content

Course Content

Introduction to JavaScript

Introduction to JavaScript

1. JavaScript Fundamentals
2. Variables and Data Types in JavaScript
3. Performing Operations in JavaScript
4. Controlling Program Flow with Conditional Statements
5. Looping Through Data in JavaScript
6. Functions in JavaScript

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Defining Functions in JavaScript

To create a new function, use the function keyword. Provide a name for the function and define any arguments it should accept:

The structure of a function definition includes:

  • The function keyword;
  • The function name, typically in camelCase like variables;
  • Arguments enclosed in parentheses ();
  • A code block within curly brackets {}.

Arguments

Functions have their own data storage space. Arguments are values passed to a function, which the function uses as variables. These arguments cease to exist when the function finishes executing.

To define arguments, assign a name to each one:

If a function accepts multiple arguments, separate them with commas (,).

Note

Arguments are used like variables inside the function's code block.

Function calling

To use a function, call it using parentheses () and provide the necessary arguments if the function expects any:

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// Function Definition function func(arg) { console.log("Argument received:", arg); console.log("Argument type:", typeof arg); } // Function Calling func(1); func(2521); func("Rabbit"); func(true);
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Section 6. Chapter 2
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