Introduction to JavaScript – CONSOLE

Overview

Before diving into data types and methods in JavaScript, it’s essential to understand how to print values to the console. The console.log() command is a fundamental tool that developers use to display the output of their JavaScript programs.

What is console.log()?  –  Introduction to JavaScript – CONSOLE

The console.log() command is used to print, or log, text and other data types to the console. This helps developers see the output of their code and debug issues.

Example

Consider the following example:

console.log("Hello!");

In this example, the string “Hello!” is logged to the console. Notice the use of a semicolon at the end of the line. While JavaScript may run without semicolons in some cases, it’s best practice to include them to ensure your code runs as expected.

Using console.log() with Different Data Types

You can print various data types using console.log(). Here are a few examples:

String:

console.log("Welcome to JavaScript!");

Number:

console.log(2024);

Boolean:

console.log(true);
console.log(false);

Variable:

let greeting = "Hello, World!";
console.log(greeting);

Assignment – Introduction to JavaScript – CONSOLE

Now, it’s your turn to practice using console.log(). Complete the following tasks:

1. Print your name to the console.
2. Print the number 100 to the console.
3. Print the boolean value true to the console.
4. Declare a variable called myAge and assign your age to it. Print myAge to the console.
5. Print the result of the expression 5 + 10 to the console.

Answer Key – Introduction to JavaScript – CONSOLE

1. Print your name:

console.log("Your Name");

2. Print the number 100:

console.log(100);

3. Print the boolean value true:

console.log(true);

4. Declare a variable called myAge and assign your age to it. Print myAge:

let myAge = 25; // Replace 25 with your actual age
console.log(myAge);

5. Print the result of the expression 5 + 10:

console.log(5 + 10);

Summary – Introduction to JavaScript – CONSOLE

The console.log() command is a powerful tool for developers to print values to the console, helping in debugging and ensuring the program works correctly. By practicing with different data types and expressions, you’ll become more comfortable using this essential command in JavaScript.

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