Kotlin Types

Basic Types

In Kotlin, almost everything is an object, including numbers, characters, and boolean types. Even though numbers may be represented using primitive types at the lower level, they can still be used like ordinary classes.

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Numbers

Numbers include integer types and floating-point types.

Integer Types

Kotlin provides a set of built-in types to represent numbers. For integers, there are four different-sized types, each with its own range of values.

When you define a variable without specifying its type, Kotlin's compiler automatically infers the type.

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val one = 1 // Int
val threeBillion = 3000000000 // Long
val oneLong = 1L // Long
val oneByte: Byte = 1

Float Types

Boolean

Char

String

Arrays