VARIABLES

• THESE ARE BOXES THAT HOLD VALUE / DATA
• EACH VARIABLE HAS A NAME TO ACESS ITS DATA
• VARIABLES IN KOTLIN CAN BE CREATED BY USING 2 KEYWORDS , THOSE ARE “VAR ” AND “VAL
• THE VALUE FOR VAR CAN BE REASSIGNED , BUT THE VALUE FOR VAL CANNOT BE REASSIGNED . VAL IS KIND OF A CONSTANT WHOSE VALUE CANNOT BE CHANGED.

Variables in Kotlin are used to store data that can be referenced and manipulated within a program. Kotlin provides a flexible and type-safe way to declare variables with different levels of mutability and types.

Types of Variables:

1. Immutable Variables (val):
   • These are read-only variables. Once assigned a value, it cannot be changed.
   • Syntax: val variableName: Type = value
2. Mutable Variables (var):
   • These variables can be reassigned with new values.
   • Syntax: var variableName: Type = value

Variable Declaration Examples:

1. Immutable Variable (val):

val name: String = "John"
val age: Int = 25
// name = "Doe" // Error: Val cannot be reassigned

1. Mutable Variable (var):

var city: String = "New York"
var temperature: Int = 30
city = "Los Angeles" // This is allowed

Type Inference:

Kotlin has type inference, meaning the type can be automatically inferred by the compiler based on the assigned value, so specifying the type is optional if it's clear from the context.

val name = "John"  // Compiler infers String
var age = 25       // Compiler infers Int