well-hello-kotlin

A project I'm using to start learning about Kotlin.

In the beginning, I plan on solving simple Kotlin exercises found on Exercism and Kotlin Koans.

I am coming from C#, and aim to populate my Kotlin from C# cheat sheet below as I advance through the exercises.

Kotlin from C# – Cheat sheet

Function/Method

Signature structure

Kotlin

fun functionName(inputName: InputType): ReturnType {
  ...
}

C#

ReturnType MethodName(InputType inputName)
{
  ...
}

Example

Kotlin

fun equalsOne(number: Int): Boolean {
  return number == 1
}

C#

bool EqualsOne(int number)
{
  return number == 1;
}

When a function/method does not return anything, ReturnType is omitted in Kotlin:

Kotlin

fun doNothing() { }

C#

void DoNothing() { }

Default arguments / Optional arguments

Default arguments in Kotlin correspond to optional arguments in C#. They are provided in the exact same way.

Kotlin

fun equalsOne(number: Int = 1): Boolean {
  return number == 1
}

C#

bool EqualsOne(int number = 1)
{
  return number == 1;
}

Named arguments

Named arguments exist in both Kotlin and C#.

Kotlin

equalsOne(number = 0)

C#

EqualsOne(number: 0)