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KOTLIN Tutorial
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Data Types

In the realm of programming, data types play a crucial role in defining the nature of variables and how they interact with each other. Kotlin, a modern programming language, inherits a robust and expressive system for data types. Let’s delve into the intricacies of data types in Kotlin to gain a comprehensive understanding.

Primitives in Kotlin

Kotlin provides a set of primitive data types that represent the basic building blocks of information. These include:

1. Integers (Int):

In Kotlin, the Int data type is used to represent whole numbers. It’s a 32-bit signed integer.

2. Long:

When dealing with larger integer values, the Long data type is employed. It is a 64-bit signed integer.

3. Short and Byte:

For scenarios where memory conservation is critical, Kotlin offers Short (16-bit) and Byte (8-bit) data types.

4. Floating-point Numbers (Float and Double):

When precision is required, Kotlin provides Float (32-bit) and Double (64-bit) for representing decimal numbers.

5. Characters (Char):

The Char data type is used to store a single 16-bit Unicode character.

6. Boolean:

Representing true or false values, the Boolean data type is fundamental for conditional operations.

Non-Primitive Data Types

Moving beyond the basics, Kotlin also supports non-primitive or reference data types:

7. Strings:

Strings in Kotlin are represented by the String class, offering a plethora of functions for string manipulation.

8. Arrays:

Arrays allow you to group elements of the same data type under one variable. Kotlin provides concise syntax for array declaration and manipulation.

9. Lists, Sets, and Maps:

Kotlin offers rich collections like lists, sets, and maps, providing powerful ways to manage and manipulate data.

Type Inference in Kotlin

One of the key features of Kotlin is its ability to infer data types automatically, reducing the need for explicit type declarations. This enhances code readability and conciseness.

Nullable Types

In Kotlin, variables are non-nullable by default. However, when nullability is required, the ? modifier can be used, allowing variables to accept null values.

User-Defined Types

10. Enums:

Enums in Kotlin allow you to define a set of named constants. They enhance code readability and maintainability by providing a clear representation of possible values.

11. Classes and Objects:

Kotlin is an object-oriented language, and it supports the creation of classes and objects, allowing for the implementation of complex data structures and behaviors.