Boolean Data type Usage and Type Conversion in Kotlin

Definition

• Boolean data type represents only two values.Either true or false.
• The data type can be either declared explicitly or the compiler itself has the ability to infer the type of the assigned value.
• In JVM, the characteristics of this “Long” variable is derived from the characteristics of primitive type “long” of Java which has a non-nullable default value.

Syntax and declaration

Thus a Boolean value can be declared by 3 ways as mentioned below.

1. Mentioning type explicitly

val variable_name : Boolean = true

for example,

val check : Boolean = false

2. Data type is automatically inferred

val variable_name = true

for example,

val check = false

3. Declaring and Initializing separately

var variable_name : Boolean
variable_name = true

for example

//Declaring and Initializing separately
var check:Boolean
check = true

Boolean Datatype Example Program in Kotlin

// Boolean Datatype Kotlin example program
// Data type Kotlin Programs, Basic Kotlin Programs
	
fun main(args:Array<String>) {
    //Assigning value to Boolean variable explicitly
    val a:Boolean = true
    //Declaring a Boolean value immediately
    val b:Boolean = false
    
    println("Boolean value in a is $a")
    println("Boolean value in b is $b")
}

Sample Output

Boolean value in a is true
Boolean value in b is false

How It Works

This Kotlin program demonstrates Boolean Data type Usage and Type Conversion. It first prepares the data it needs, then performs the core operation step by step, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.