Commonly Used Built-in JavaScript Function

The Most Common Built-In JavaScript Functions for Beginners

JavaScript is a powerful programming language that can be used to create interactive web pages, mobile apps, and more. One of the things that makes JavaScript so versatile is its large library of built-in functions. These functions are pre-defined and can be used to perform common tasks, such as manipulating strings, numbers, and arrays.

Here are some of the most common built-in JavaScript functions:

• console.log(): This function prints a message to the console.

• alert(): This function displays an alert dialog box.

• prompt(): This function prompts the user for input.

• typeof(): This function returns the type of a value.

• parseInt(): This function converts a string to an integer.

• parseFloat(): This function converts a string to a floating-point number.

• concat(): This function concatenates two or more strings.

• slice(): This function returns a portion of an array.

• indexOf(): This function returns the index of a value in an array.

• forEach(): This function iterates over an array and executes a callback function for each element.

These are just a few of the many built-in JavaScript functions. As you learn more about JavaScript, you will discover more functions that you can use to make your code more efficient and powerful.