Kotlin Data Types

Kotlin Data Types

Data types in Kotlin define what kind of data a variable can hold. Kotlin is a statically typed language, which means every variable has a specific data type.

1. Numbers (Numeric Data Types)

Integer Types

Floating-Point Types

2. Boolean Data Type

Used for true or false values.

3. Character (Char)

Stores a single character.

•  Use single quotes for Char.

4. String Data Type

Stores a sequence of characters.

Multi-Line String

5. Arrays

Used to store multiple values of the same type.

Access elements:

6. Nullable Data Types

By default, variables cannot be null.

To allow null:

7. Type Conversion

Kotlin does not allow implicit conversion.

Common conversions:

• toInt()

• toDouble()

• toFloat()

• toString()

8. Any, Unit, and Nothing

Any

Parent of all classes.

Unit

Represents no meaningful value (like void in Java).

Nothing

Represents no value at all (used in exceptions).

Summary

• Kotlin has strongly typed data types

• Supports nullable and non-nullable types

• No implicit type casting

• Rich standard data types