Boolean type and logical operators in Kotlin - Mini Project: Build & Apply

Boolean type and logical operators

📖 Scenario: You are creating a simple program to check if a person is eligible for a discount based on their age and membership status.

🎯 Goal: Build a Kotlin program that uses Boolean variables and logical operators to decide if a person gets a discount.

📋 What You'll Learn

Create Boolean variables to represent conditions

Use logical operators && (AND), || (OR), and ! (NOT)

Print the final eligibility result

💡 Why This Matters

🌍 Real World

Many apps check user eligibility for offers or access using true/false conditions combined with AND, OR, and NOT.

💼 Career

Understanding Boolean logic is essential for programming decisions, validations, and controlling program flow.

1

Create Boolean variables for age and membership

Create two Boolean variables called isAdult and isMember. Set isAdult to true and isMember to false.

Kotlin

# Your code here

Need a hint?

Use val to create Boolean variables and assign true or false.

2

Create a Boolean variable for discount eligibility

Add a Boolean variable called hasDiscount that is true if the person is an adult AND a member. Use the && operator with isAdult and isMember.

Kotlin

fun main() {
    val isAdult = true
    val isMember = false
    
    // Create hasDiscount using isAdult && isMember
    // Your code here
}

Need a hint?

Use val hasDiscount = isAdult && isMember to combine the two conditions.

3

Add a condition for senior discount using OR operator

Create a Boolean variable called isSenior and set it to true. Then update hasDiscount to be true if the person is an adult AND a member OR if the person is a senior. Use || operator.

Kotlin

fun main() {
    val isAdult = true
    val isMember = false
    
    val hasDiscount = isAdult && isMember
    
    // Create isSenior and update hasDiscount
    // Your code here
}

Need a hint?

Use parentheses to group isAdult && isMember before OR isSenior.

4

Print the discount eligibility result

Write a println statement to display the value of hasDiscount.

Kotlin

fun main() {
    val isAdult = true
    val isMember = false
    
    val isSenior = true
    val hasDiscount = (isAdult && isMember) || isSenior
    
    // Print hasDiscount
    // Your code here
}

Need a hint?

Use println(hasDiscount) to show the result.