📌 If-Else Expression in Kotlin

In Kotlin, if and else are used for conditional decision-making. Unlike some other languages, Kotlin treats if-else as an expression, meaning it can return a value. This makes it more flexible and concise.

✅ 1. Basic If-Else Statement

You can use if-else like a traditional conditional statement.

📌 Example:

kotlin
fun () {    val number = 10    if (number > 0) {        println("$number is positive")    } 10 is positive

• if checks the condition number > 0

• else executes when the condition is false

✅ 2. If-Else Expression

In Kotlin, if-else can be used as an expression to return a value.

📌 Example:

kotlin
fun () {    val a = 15    val b = 20    val max = if (a > b) a else b    println("The maximum value is $max")}

Output:

csharp
The maximum fun () {    val number = -5    val result = if (number > 0) {        "Positive"    } else if (number < 0) {        "Negative"    } else {        "Zero"    }    println("The number is $result")}

Output:

cshar
The number fun () {    val a = 10    val b = 20    val c = 15    val max = if (a > b) {        if (a > c) a else c    } else {        if (b > c) b else c    }    println("The maximum value is $max")}

Output:

csharp
The maximum fun main() {    val age = 18    if (age >= 18) {        println("Eligible to vote")    }    println("Program completed")}

Output:

css
Eligible to voteProgram completed

• If the condition is true, the statement executes.

• If false, it skips the block and moves on.

✅ 6. Conclusion

• Use if-else as a statement for conditional logic.

• Use if-else expressions to return values.

• Combine multiple conditions using else if.

• Use nested if-else for complex decisions.

• Kotlin's if is more powerful and concise compared to other languages.