JavaScript console.log() method is “used to write (log) a message to the console”. The console.log() method is helpful in testing.
To enable more advanced formatting, it can also accept format specifiers, such as %s for strings, %d or %i for integers, and %f for floating-point numbers.
Syntax
console.log(message)
Parameters
“message”: The parameter is required, which is the message to write to the console.
Return value
None.
Example 1: How to Use console.log() Method
console.log("Homer, Simpson!");
const fname = "Bart Simpson";
const age = 9;
console.log('My name is', fname, 'and I am', age, 'years old.');
console.log('My name is %s and I am %d years old.', fname, age);
Output
Homer, Simpson!
My name is Bart Simpson and I am 9 years old.
My name is Bart Simpson and I am 9 years old.
Example 2: Passing a character to the console.log() method
If you pass a char to the function console.log(), the function will display it.
let char = "21";
console.log(char);
Output
21
Example 3: Passing a function to the console.log() method
If you pass a function as an argument, the console.log() method will display the value of the passed function.
function meth() {
return (21 * 19);
}
console.log(meth());
Output
399
Example 4: Passing a number to the console.log() method
If you pass the number to the console.log() method, it will display it with a provided message.
let num = 21;
console.log("The value of num is: ", num);
Output
The value of num is: 21
Browser compatibility
All the browsers support it.
That’s it.

Krunal Lathiya is a seasoned Computer Science expert with over eight years in the tech industry. He boasts deep knowledge in Data Science and Machine Learning. Versed in Python, JavaScript, PHP, R, and Golang. Skilled in frameworks like Angular and React and platforms such as Node.js. His expertise spans both front-end and back-end development. His proficiency in the Python language stands as a testament to his versatility and commitment to the craft.