Kotlin Data Types

01 May, 2022
The most fundamental data type in Kotlin is the Primitive data type and all others are reference types like array and string. Java needs to use wrappers (java.lang.Integer) for primitive data types to behave like objects but Kotlin already has all data types as objects.
There are different data types in Kotlin:
Integer Data typeFloating-point Data TypeBoolean Data TypeCharacter Data Type
Integer Data type
Floating-point Data Type
Boolean Data Type
Character Data Type
These data types contain integer values.
Data Type
Bits
Min Value
Max Value
Let’s write a program to represent all the integer data types and their min and max values.
Kotlin
// Kotlin codefun main(args : Array<String>) {    var myint = 35       // add suffix L for long integer    var mylong = 23L         println("My integer ${myint}")    println("My long integer ${mylong}")     var b1: Byte = Byte.MIN_VALUE    var b2: Byte = Byte.MAX_VALUE    println("Smallest byte value: " +b1)    println("Largest byte value: " +b2)     var S1: Short = Short.MIN_VALUE    var S2: Short = Short.MAX_VALUE    println("Smallest short value: " +S1)    println("Largest short value: " +S2)     var I1: Int = Int.MIN_VALUE    var I2: Int = Int.MAX_VALUE    println("Smallest integer value: " +I1)    println("Largest integer value: " +I2)     var L1: Long = Long.MIN_VALUE    var L2: Long = Long.MAX_VALUE    println("Smallest long integer value: " +L1)    println("Largest long integer value: " +L2)}
Output:
My integer 35
My long integer 23
Smallest byte value: -128
Largest byte value: 127
Smallest short value: -32768
Largest short value: 32767
Smallest integer value: -2147483648
Largest integer value: 2147483647
Smallest long integer value: -9223372036854775808
Largest long integer value: 9223372036854775807
These data type used to store decimal value or fractional part.
Data Type
Bits
Min Value
Max Value
Let’s write a program to represent both the floating-point data type and their min and max value.
Kotlin
// Kotlin codefun main(args : Array<String>) {      // add suffix F for float    var myfloat = 54F                    println("My float value ${myfloat}")     var F1: Float = Float.MIN_VALUE    var F2: Float = Float.MAX_VALUE    println("Smallest Float value: " +F1)    println("Largest Float value: " + F2)     var D1: Double = Double.MIN_VALUE    var D2: Double = Double.MAX_VALUE    println("Smallest Double value: " + D1)    println("Largest Double value: " + D2)}
Output:
My float value 54.0
Smallest Float value: 1.4E-45
Largest Float value: 3.4028235E38
Smallest Double value: 4.9E-324
Largest Double value: 1.7976931348623157E308
Boolean data type represents only one bit of information either true or false. The Boolean type in Kotlin is the same as in Java. These operations disjunction (||) or conjunction (&&) can be performed on boolean types.
Data Type
Bits
Data Range
Let’s write a program to represent the boolean data types.
Kotlin
// Kotlin codefun main(args : Array<String>){if (true is Boolean){        print("Yes,true is a boolean value")    }}
Output:
Yes, true is a boolean value
Character data type represents the small letters(a-z), Capital letters(A-Z), digits(0-9) and other symbols.
Data Type
Bits
Min Value
Max Value
Let’s write a program to represent character data type.
Kotlin
// Kotlin codefun main(args : Array<String>){    var alphabet: Char = 'C'    println("C is a character : ${alphabet is Char}")}
Output:
C is a character : true
Rajeev Joshi
hassaangagroo099
Kotlin
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