Kotlin basic type:- Geniusofstudent

Basic Types

In Kotlin, everything is an object in the sense that we can call member functions and properties on any variable. Some types are built-in, because their implementation is optimized, but to the user they look like ordinary classes.

Numbers

Kotlin handles numbers in a way close to Java, but not exactly the same.

Kotlin provides the following built-in types representing numbers (this is close to Java):

Type	Bit width
Double	64
Float	32
Long	64
Int	32
Short	16
Byte	8

Note that characters are not numbers in Kotlin.

Characters

Characters are represented by the type Char. They can not be treated directly as numbers

fun check(c: Char) {
    if (c == 1) { // ERROR: incompatible types
    // ...
    }
    }

Booleans

The type Boolean represents booleans, and has two values: true and false.

Arrays

Arrays in Kotlin are represented by the Arrayclass, that has get and set functions (that turn into [] by operator overloading conventions), and size property, along with a few other useful member functions:

class Array private constructor() {
    val size: Int
    operator fun get(index: Int): T
    operator fun set(index: Int, value: T): Unit

    operator fun iterator(): Iterator
        // ...
        }

Strings

Strings are represented by the type String. Strings are immutable. Elements of a string are characters that can be accessed by the indexing operation: s[i]. A string can be iterated over with a for-loop:

for (c in str) {
    println(c)
    }