In this guide, we’ll explore various aspects of functions in JavaScript, including their declaration, parameters, function expressions, and more.
Functions are a fundamental concept in JavaScript, allowing developers to encapsulate code for reuse, organization, and abstraction. In this guide, we’ll explore various aspects of functions in JavaScript, including their declaration, parameters, return statements, function expressions, and arrow functions. 1. Declaration of Functions In JavaScript, functions can be declared using the function keyword followed by the function name and a pair of parentheses containing optional parameters.
The subtract function takes two parameters a and b and returns the result of a - b. The add function takes two parameters a and b and returns their sum. add a b The subtract function takes two parameters a and b and returns the result of a - b . subtract a b a - b 3. Return Statements Return Statements Functions can use the return statement to send a value back to the code that called the function. If a function doesn't explicitly return a value, it implicitly returns undefined .
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