JavaScript has a built-in tool called console.log() that allows you to print messages to the browser’s console. The console is a special window that developers can use to check the status of their code and troubleshoot any issues that may arise.

console.log() is a function that takes a single argument, which is the message you want to print. For example:

console.log("Hello, World!");

This code will print the message “Hello, World!” to the console.

You can also use console.log() to print the value of variables. For example:

let x = 5;
console.log(x);

This code will print the value of the variable x, which is 5, to the console.

One of the most common use cases for console.log() is to check the value of a variable at different points in your code. This can help you understand how the variable is changing and identify any issues that may be causing unexpected behavior.

Another use case of console.log() is to check the result of function call, or to debug the function call itself.

let result = addNumbers(5,7);
console.log(result);

This will print the result of the function call on the console, which can be useful to check if the function is working as intended.

It’s important to note that the console is only visible when you are running your code in a browser’s developer tools, so make sure to open the developer tools in your browser before using console.log().

In short, console.log() is a simple but powerful tool that can help you understand what’s happening in your JavaScript code. It allows you to see the values of variables, check the results of function calls, and troubleshoot any issues that may arise.