Kotlin Boolean xor Function

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The xor function in Kotlin is used to perform a logical XOR (exclusive OR) operation between two Boolean values. This function belongs to the Boolean class in the Kotlin standard library and provides a way to combine two Boolean values using the XOR operation.

Table of Contents

1. Introduction
2. xor Function Syntax
3. Understanding xor
4. Examples
   • Basic Usage
   • Combining Multiple Conditions
   • Using xor in Conditional Statements
5. Real-World Use Case
6. Conclusion

Introduction

The xor function returns true if exactly one of the Boolean values is true. If both values are true or both are false, it returns false. This is useful for conditions where only one of the values should be true.

xor Function Syntax

The syntax for the xor function is as follows:

infix fun Boolean.xor(other: Boolean): Boolean

Parameters:

• other: The Boolean value to combine with the original Boolean value using the XOR operation.

Returns:

• true if exactly one of the Boolean values is true; otherwise, false.

Understanding xor

The xor function performs a logical XOR operation. The result is true only if one of the operands is true and the other is false. If both operands are the same, the result is false.

Examples

Basic Usage

To demonstrate the basic usage of xor, we will combine two Boolean values.

Example

fun main() {
    val bool1 = true
    val bool2 = false
    val result = bool1 xor bool2
    println("Result of bool1 xor bool2: $result")
}

Output:

Result of bool1 xor bool2: true

Combining Multiple Conditions

This example shows how to combine multiple Boolean conditions using the xor function.

Example

fun main() {
    val isWeekend = true
    val isHoliday = false
    val canRelax = isWeekend xor isHoliday
    println("Can relax: $canRelax")
}

Output:

Can relax: true

Using xor in Conditional Statements

This example demonstrates how to use the xor function in conditional statements.

Example

fun main() {
    val isMember = true
    val hasInvitation = true
    if (isMember xor hasInvitation) {
        println("You have limited access.")
    } else {
        println("You have full access or no access.")
    }
}

Output:

You have full access or no access.

Real-World Use Case

Validating User Roles

In real-world applications, the xor function can be used to validate conditions where only one of the states should be true, such as checking user roles or permissions.

Example

fun main() {
    val isAdmin = false
    val isEditor = true
    val canEditSettings = isAdmin xor isEditor

    if (canEditSettings) {
        println("User can edit settings.")
    } else {
        println("User cannot edit settings.")
    }
}

Output:

User can edit settings.

Conclusion

The xor function in Kotlin's Boolean class is a useful method for performing logical XOR operations between two Boolean values. It provides a simple way to combine conditions and perform logical checks where exactly one condition should be true. By understanding and using this function, you can effectively manage XOR operations in your Kotlin applications.