Functions

Functions

Function Declarations

Functions in Kotlin are declared using the fun keyword

fun double(x: Int): Int {
}

Function Usage

Calling functions uses the traditional approach

val result = double(2)

Calling member functions uses the dot notation

Sample().foo() // create instance of class Sample and calls foo

Infix notation

Functions can also be called using infix notations when

• They are member functions or extension functions
• They have a single parameter
• They are marked with the infix keyword

// Define extension to Int
infix fun Int.shl(x: Int): Int {
...
}

// call extension
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