Logical operators (&&, ||, !) in Kotlin - Mini Project: Build & Apply

Logical Operators Practice in Kotlin

📖 Scenario: You are creating a simple access control system for a small event. You need to check if a person meets certain conditions to enter.

🎯 Goal: Build a Kotlin program that uses logical operators &&, ||, and ! to decide if a person can enter the event.

📋 What You'll Learn

Create variables for age and hasInvitation

Create a variable for minimum age allowed

Use logical operators to check if the person is allowed

Print the result as true or false

💡 Why This Matters

🌍 Real World

Access control systems often check multiple conditions like age and invitation status before allowing entry.

💼 Career

Understanding logical operators is essential for programming decisions in apps, websites, and software that require condition checks.

1

Create initial data variables

Create a variable age with value 20 and a variable hasInvitation with value true.

Kotlin

// Create variables age and hasInvitation
// Your code here

Need a hint?

Use val to create variables. Assign 20 to age and true to hasInvitation.

2

Add minimum age configuration

Create a variable minAge and set it to 18.

Kotlin

val age = 20
val hasInvitation = true
// Create variable minAge and set it to 18
// Your code here

Need a hint?

Use val minAge = 18 to set the minimum age allowed.

3

Use logical operators to check access

Create a variable canEnter that is true if age is greater than or equal to minAge and hasInvitation is true. Use the && operator.

Kotlin

val age = 20
val hasInvitation = true
val minAge = 18
// Create canEnter using && operator
// Your code here

Need a hint?

Use parentheses to compare age >= minAge and combine it with hasInvitation using &&.

4

Print the access result

Print the value of canEnter using println.

Kotlin

val age = 20
val hasInvitation = true
val minAge = 18
val canEnter = (age >= minAge) && hasInvitation
// Print canEnter
// Your code here

Need a hint?

Use println(canEnter) to show the result.