Logical operators in Javascript - Mini Project: Build & Apply

Logical Operators Practice

📖 Scenario: You are building a simple access control system for a small event. You want to check if a person is allowed entry based on their age and whether they have a ticket.

🎯 Goal: Create a program that uses logical operators to decide if a person can enter the event. The program will check if the person is at least 18 years old and if they have a ticket.

📋 What You'll Learn

Create a variable age with the value 20

Create a variable hasTicket with the value true

Create a variable canEnter that uses the logical AND operator to check if age is at least 18 and hasTicket is true

Print the value of canEnter

💡 Why This Matters

🌍 Real World

Logical operators are used in many real-world programs to make decisions based on multiple conditions, like checking user permissions or filtering data.

💼 Career

Understanding logical operators is essential for programming jobs because they help control the flow of programs and implement rules.

1

Create initial variables

Create a variable called age and set it to 20. Create another variable called hasTicket and set it to true.

Javascript

// Create a variable called age and set it to 20
// Create a variable called hasTicket and set it to true

Need a hint?

Use let to create variables. Set age to 20 and hasTicket to true.

2

Create access condition

Create a variable called canEnter that uses the logical AND operator && to check if age is greater than or equal to 18 and hasTicket is true.

Javascript

let age = 20;
let hasTicket = true;
// Create a variable called canEnter using logical AND to check age >= 18 and hasTicket

Need a hint?

Use let canEnter = (age >= 18) && hasTicket; to combine the conditions.

3

Add a condition for underage without ticket

Modify the canEnter variable to also allow entry if the person is under 18 but has a special pass. First, create a variable called hasSpecialPass and set it to false. Then update canEnter to be true if the person is at least 18 and has a ticket, OR if they have a special pass.

Javascript

let age = 20;
let hasTicket = true;
let canEnter = (age >= 18) && hasTicket;
// Create a variable hasSpecialPass set to false
// Update canEnter to allow entry if age >= 18 and hasTicket, or hasSpecialPass is true

Need a hint?

Use the logical OR operator || to add the special pass condition.

4

Display the result

Print the value of canEnter using console.log().

Javascript

let age = 20;
let hasTicket = true;
let hasSpecialPass = false;
let canEnter = ((age >= 18) && hasTicket) || hasSpecialPass;
// Print canEnter using console.log

Need a hint?

Use console.log(canEnter); to show the result.