📌 Data Types in Kotlin

In Kotlin, data types define the type of data that a variable can hold. Kotlin is a statically typed language, meaning the data type of variables is determined at compile time.

✅ 1. Basic Data Types in Kotlin

Kotlin provides the following built-in data types:

✅ 2. Examples of Basic Data Types

kotlin
fun () {    val byteValue: Byte = 120    val shortValue: Short = 32000    val intValue: Int = 2147483647    val longValue: Long = 9223372036854775807L    val floatValue: Float = 3.14F    val doubleValue: Double = 3.14159265359    val charValue: Char = 'K'    val booleanValue: Boolean = true    val stringValue: String = "Kotlin Programming"    println("Byte: $byteValue")    println(val age = 25 // Inferred as Intval name = "John" // Inferred as Stringval isStudent = true // Inferred as Booleanprintln("Age: $age, Name: val num1: Int = 100val num2: Double = num1.toDouble()println("Int to Double: $num2")val num3: Int = str.toInt()println("String to Int: $num3")

Output:

pgsql
Int to Double: 100.0String to Int: 123

✅ 5. Nullable Data Types

In Kotlin, variables are non-nullable by default.
If you want to allow a variable to store a null value, use a nullable data type by adding ?.

📌 Example: Nullable Data Types

kotlin
var name: String? = "Alice"println(name?.length) // Safe call to prevent NullPointerExceptionname = nullprintln(name?.length) // Prints null

• ?. → Safe call operator to avoid NullPointerException.

✅ 6. Conclusion

• Kotlin provides all standard data types like Int, Float, String, etc.

• Type inference reduces the need to specify data types explicitly.

• Nullable types prevent null-related errors using ? and safe calls.

• Type conversion is done using functions like toInt() and toString().