Kotlin Programming By Example

Declaring functions

Functions are declared with the fun keyword. The following is a simple function definition:

fun printSum(a: Int, b: Int) {  print(a + b)}

The function simply prints the sum of two values that have been passed as arguments to it. Function definitions can be broken down into the following components:

• A function identifier: The identifier of a function is the name given to it. An identifier is required to refer to the function if we wish to invoke it later on in a program. In the preceding function declaration, printSum is the identifier of the function.
• A pair of parentheses containing a comma-separated list of the arguments being passed as values to the function: Values passed to a function are called arguments of the function. ...