Learn how to create functions in JavaScript with our beginner-friendly guide. Explore the syntax, parameters, returning values, and examples for creating powerful functions in your JavaScript programs.
In JavaScript, functions are reusable blocks of code that can be called or invoked to perform a specific task. They help organize code, improve reusability, and enable modular programming.
To create a function in JavaScript, you can use the following syntax:
function functionName(parameter1, parameter2, ...) { // Function code goes here // You can perform operations, calculations, or any desired tasks // You can also use the parameters inside the function return result; // optional - specify the value to be returned by the function }
Here's an example of a function that adds two numbers:
function addNumbers(a, b) { var sum = a + b; return sum; }
In the above example, the function is named addNumbers and takes two parameters a and b. It calculates the sum of a and b and returns the result.
You can call this function by using its name and passing the required arguments:
var result = addNumbers(3, 5); console.log(result); // Output: 8
In this example, addNumbers(3, 5) is called, and the returned value is stored in the result variable. The console then logs the value of the result, which is 8.
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