KOTLIN Tutorial

SYNTAX IN KOTLIN

In Kotlin, you define variables and functions with specific syntax. Understanding Kotlin’s basic syntax is key to writing efficient and concise code.

Note:

The syntax for Kotlin is designed to be expressive and easy to read. Proper usage of keywords and structure is essential for writing clean code.

In Kotlin, you can declare variables using the val (immutable) or var (mutable) keywords:

val name: String = "Kotlin"  // Immutable
var age: Int = 5             // Mutable

Functions are defined using the fun keyword. Here’s how you declare and call a function:

fun greet(name: String) {
    println("Hello, $name!")
}

greet("Kotlin")

Kotlin supports typical control flow structures like if, else, when, for, while, etc.

val number = 10

if (number > 5) {
    println("Number is greater than 5")
} else {
    println("Number is 5 or less")
}

Kotlin provides built-in null safety mechanisms to handle null values gracefully:

Nullable Types: Use ? to declare nullable types.
Safe Call Operator: Use ?. to safely call methods or access properties of nullable objects.

var name: String? = null
println(name?.length)  // Safely prints null without causing an exception

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