When I'm writing code and haven't quite finished it yet, I like to test out the logic to make sure everything's working as it should. That's where the console.log() method comes in handy.

Here's a simple guide to using the JavaScript console.log() method:

Syntax

console.log()

Examples

It writes a message to the browser console, which can help you debug and test your JavaScript code.

Basic usage:

console.log("Hello"); // Console --> Hello
console.log(1 + 2); // Console --> 3

You can log multiple arguments:

console.log("Hello", 1 + 2);
// Console --> Hello 3

You can log objects:

const user = { name: "John", age: 30 };
console.log(user);
// Console --> { name: "John", age: 30 }

You can format your logs with template literals:

const name = "John";
console.log(`Hello, my name is ${name}!`);
// Console --> Hello, my name is John!

You can log your feature to debug:

// Create a function test() that logs out the content of an array
// Add console log to verify that the loop is working
// Call/invoke the function

const array = [1, 2, 3]

function test() {
    for (let = i; i < array.length; i++){
    console.log(array[i])
}

test()
// Console --> display the content of the array. Correct. 
// So the function is working.

In conclusion, the console.log() method is a versatile tool that can help you debug and test your JavaScript code. Whether you're logging a simple message or a complex object, console.log() is a great way to quickly check that your code is working as expected. Thanks for reading, and happy coding! 🥳

Simple way to debug in Javascript - console.log

Table of contents

Syntax

Examples