Kotlin if Expression

The if expression is used to make decisions based on a condition. In Kotlin, if is an expression, which means that it returns a value.

Syntax

if (condition) {
    // Code to be executed if condition is true
} else {
    // Code to be executed if condition is false
}

Example

fun main() {
    val number = 10
    val result = if (number % 2 == 0) {
        "Even"
    } else {
        "Odd"
    }
    println(result)
}

Output

Even

Explanation

In the example, the if expression checks whether the number variable is even or odd. If the condition number % 2 == 0 is true, the expression returns the string "Even". Otherwise, it returns the string "Odd". The resulting value is assigned to the result variable, which is then printed to the console.

Use

The if expression is commonly used for making decisions in code. It's often used in combination with other expressions, such as when expressions and try-catch blocks.

Important Points

• The if expression is used to make decisions based on a condition.
• In Kotlin, if is an expression that returns a value.
• The if expression can be used with or without the else keyword.
• The if expression can be used in combination with other expressions, such as when expressions and try-catch blocks.

Summary

The if expression is a powerful tool in Kotlin for making decisions based on conditions. It's an expression that returns a value, which makes it more flexible than a if statement. The if expression can be used in a variety of situations, and it's an essential tool for any Kotlin developer's toolbelt.