Kotlin Basics

1. Introduction

- Kotlin is a modern, concise, safe, and interoperable language developed by JetBrains.
- Fully compatible with Java.

2. Hello World

```kotlin
fun main() {
println("Hello, World!")
}
```

3. Variables

```kotlin
val name = "Rakesh" // immutable
var age = 25 // mutable
```

4. Data Types

- Int, Long, Double, Float, Char, String, Boolean

```kotlin
val x: Int = 10
val pi: Double = 3.14
val isKotlinFun: Boolean = true
```

5. Conditional Statements

```kotlin
val number = 10
if (number > 0) {
println("Positive")
} else {
println("Non-positive")
}
```

6. Loops

```kotlin
for (i in 1..5) {
println(i)
}

var i = 1
while (i <= 5) {
println(i)
i++
}
```