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Learn how to define, use and manipulate parameters and arguments in JavaScript functions. See examples of default parameters, rest parameters, arguments object and object references.
Dec 4, 2023 · The arguments object is a local variable available within all non-arrow functions. You can refer to a function's arguments inside that function by using its arguments object. It has entries for each argument the function was called with, with the first entry's index at 0. For example, if a function is passed 3 arguments, you can access them as ...
Oct 4, 2023 · A list of parameters to the function, enclosed in parentheses and separated by commas. The JavaScript statements that define the function, enclosed in curly braces, { /* …. */ }. For example, the following code defines a simple function named square: js. function square(number) { return number * number; }
Oct 4, 2023 · You can refer to a function's arguments within the function by using the arguments object. arguments. An array-like object containing the arguments passed to the currently executing function. arguments.callee. The currently executing function. arguments.length. The number of arguments passed to the function.
A function is an independent block of code that performs a specific task, while a function expression is a way to store functions in variables. Here's a quick example of function and function expression. You can read the rest of the tutorial for more.
Learn how to create and use functions in JavaScript, including function declaration, parameters, return values, local variables and naming conventions. See examples of functions with different prefixes and purposes.
Learn how to use parameters in JavaScript functions to customize the output and pass data. See examples of passing values, variables, arrays, and objects as arguments to functions.
