Primitive data types in Javascript - Mini Project: Build & Apply

Understanding Primitive Data Types in JavaScript

📖 Scenario: You are learning how to store simple pieces of information in JavaScript. These simple pieces are called primitive data types. They include numbers, text, true/false values, and more.

🎯 Goal: You will create variables using different primitive data types and then display their values.

📋 What You'll Learn

Create variables with exact names and values for each primitive type

Use correct JavaScript syntax for each data type

Print the values of all variables exactly as specified

💡 Why This Matters

🌍 Real World

Primitive data types are the basic building blocks to store simple information like age, names, or true/false answers in any program.

💼 Career

Understanding primitive data types is essential for all programming jobs because they are used everywhere to hold and manipulate data.

1

Create variables with number and string types

Create a variable called age and set it to the number 25. Then create a variable called name and set it to the string "Alice".

Javascript

// Create a variable called age and set it to 25
// Create a variable called name and set it to "Alice"

Need a hint?

Use let to create variables. Numbers are written without quotes. Strings need quotes like double quotes.

2

Add boolean and undefined variables

Add a variable called isStudent and set it to the boolean value true. Also add a variable called middleName and set it to undefined.

Javascript

let age = 25;
let name = "Alice";
// Add a variable isStudent set to true
// Add a variable middleName set to undefined

Need a hint?

Boolean values are true or false without quotes. undefined means no value assigned.

3

Add null and symbol variables

Add a variable called car and set it to null. Then add a variable called id and set it to a new symbol with description "id".

Javascript

let age = 25;
let name = "Alice";
let isStudent = true;
let middleName = undefined;
// Add a variable car set to null
// Add a variable id set to Symbol("id")

Need a hint?

null means empty value. Symbols are unique identifiers created with Symbol().

4

Print all variable values

Use console.log to print the values of age, name, isStudent, middleName, car, and id in that order, each on its own line.

Javascript

let age = 25;
let name = "Alice";
let isStudent = true;
let middleName = undefined;
let car = null;
let id = Symbol("id");
// Print all variables using console.log, each on a new line

Need a hint?

Use console.log(variableName); to print each variable on its own line.