Byte Data type Usage and Type Conversion in Kotlin

Definition

• A byte is an 8-bit number in Kotlin. This type is mentioned explicitly.
• A byte value ranges from -128 to 127
• In JVM, the characteristics of this “Byte” variable is derived from the characteristics of primitive type byte of Java which has a non-nullable default value.

Syntax and declaration

Thus a Byte value can be declared in 2 ways as mentioned below.

1. Mentioning type explicitly

val variable_name : Byte = value

for example,

val number : Byte = 20

2. Declaring and Initializing separately

var variable_name : Byte 
variable_name = value

for example

//Declaring and Initializing separately
var number:Byte 
number = -50

Byte Datatype Example Program in Kotlin

// Byte Datatype Kotlin example program
// Data type Kotlin Programs, Basic Kotlin Programs
	
fun main(args:Array<String>) {
	//Assigning value to Byte variable explicitly
    val a:Byte = 100
    val b:Byte = -50
    println("The byte is: $a")
    println("The byte is: $b")
}

Sample Output

The byte is: 100
The byte is: -50

Type conversion syntax and declaration

//String to Byte Conversion 
val variable_name = "string".toByte()

//Int to Byte Conversion 
val variable_name = int_variable.toByte()

Byte type Conversion Example Program in Kotlin

// Byte Datatype Kotlin example program
// Data type Kotlin Programs, Basic Kotlin Programs

fun main(args: Array < String > ) {
    //Converted from String and Byte type is inferred
    val num1 = "50".toByte()

    //Conversion from String and Declaring an Byte value immediately
    val num2: Byte = "30".toByte()

    val num3: Int = 10
    //Conversion from Int
    val num4: Byte = num3.toByte()

    val num5: Float = 20.31f
    //Conversion from Float
    val num6: Byte = num5.toByte()

    //Print values after conversion
    println("String to Byte : num1 Value : $num1")
    println("String to Byte : num2 Value : $num2")
    println("Int Value : num3 Value : $num3")
    println("Int to Byte : num4 Value : $num4")
    println("Float Value : num5 Value : $num5")
    println("Float to Byte : num6 Value : $num6")
}

Sample Output

String to Byte : num1 Value : 50
String to Byte : num2 Value : 30
Int Value : num3 Value : 10
Int to Byte : num4 Value : 10
Float Value : num5 Value : 20.31
Float to Byte : num6 Value : 20

How It Works

This Kotlin program demonstrates Byte 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.