Kotlin Data Types

Kotlin Data Types

In Kotlin, everything is an object. While Kotlin often infers data types automatically, understanding the fundamental types is critical for writing robust applications.

Data types are divided into different groups:

1. Numbers

Number types are divided into two groups:

• Integer types store whole numbers, positive or negative (e.g., 123 or -456). Types include Byte, Short, Int, and Long.
• Floating point types represent numbers with a fractional part (decimals). Types include Float and Double.

val myNum: Int = 5                // Int
val myDoubleNum: Double = 5.99    // Double

2. Booleans

The Boolean data type can only take the values true or false.

val isKotlinFun: Boolean = true
val isFishTasty: Boolean = false

3. Characters & Strings

• Char: Used to store a single character. A Char must be surrounded by single quotes, like 'A' or 'c'.
• String: Used to store a sequence of characters (text). A String must be surrounded by double quotes, like "Hello World".

val myLetter: Char = 'D'
val myText: String = "Hello"