JavaScript console.log()
All modern browsers have a web console for debugging. The console.log() method is used to write messages to these consoles. For example,
let sum = 44;
console.log(sum); // 44
When you run the above code, 44 is printed on the console.
To learn more about using a console, visit: JavaScript Getting Started.
console.log() Syntax
Its syntax is:
console.log(message);
Here, the message refers to either a variable or a value.
Note: We will be using the console.log() method to display the output in our upcoming lessons.
Example 1: Print a Sentence
// program to print a sentence
// passing string
console.log("I love JS");
Output
I love JS
Example 2: Print Values Stored in Variables
// program to print variables values
// storing values
const greet = 'Hello';
const name = 'Jack';
console.log(greet + ' ' + name);
Output
Hello Jack
As you can see from these examples, console.log() makes it easier to see the value inside a variable. That's why it's commonly used for testing/debugging code.
The console object also has various methods other than console.log(). To learn more, visit JavaScript console.