Kotlin Examples

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Kotlin Syntax and Output

Output some text Output text on new lines Do a simple calculation Output some text with the print() function

Kotlin Comments

Single-line comment before a line of code Single-line comment at the end of a line of code Multi-line comment

Kotlin Variables

Create two variables Create two variables and specify the data type Declare a variable without assigning the value Create variable that cannot be changed/reassigned Combine both text and a variable Add a variable to another variable

Kotlin Data Types

Create different variables of different types Create different variables of different types explicitly Create a Byte type variable Create a Short type variable Create an Int type variable Create a Long type variable Create a Float type variable Create a Double type variable Create a Boolean type variable Create a Char type variable Create a String type variable Type conversion - Convert a data type to anoter type

資料型別解釋

Kotlin Operators

Addition operator Subtraction operator Multiplication operator Division operator Modulus operator Increment operator Decrement operator Assignment operator Equal operator Not equal operator Greater than operator Less than operator Greater than or equal to operator Less than or equal to operator Logical and operator Logical or operator Logical not operator

運算子解釋

Kotlin Strings

Create a string Create a string and specify the type Access a string Find the length of a string Compare two strings Find a string in a string Concatenate/merge two strings Concatenate/merge two strings with the plus() function Use quotes inside a string

Kotlin Booleans

Create a boolean Create a a boolean and specify the type Compare two values

布林值解釋

Kotlin If...Else

The if statement The else statement The else if statement If..else expression Short hand if..else

If...Else 解釋

Kotlin When

The when expression

Kotlin While Loop

Loop through a block of coding using a while loop Loop through a block of coding using a do/while loop

While迴圈解釋

Kotlin While Loop

Jump out of a loop with the break statement Skip a value in a loop with the continue statement

Break/continue Explained

Kotlin Arrays

Create and access an array Change an array element Find the length/size of an array Check if an element exists in an array Loop thourh an array

Kotlin For Loops

Loop through an array of strings Loop through an array of integers

For loop Explained

Kotlin Ranges

Create a range of characters Create a range of numbers Check if a value exists in a range Using the break statement in a range Using the continue statement in a range

Ranges Explained

Kotlin Functions

Create a function and call it Call a function multiple times Create a function with parameters Using the return keyword in a function Short hand syntax for return values

Kotlin Classes

Create a class and an object of that class Create multiple objects of one class Create a constructor Create a class function Create a class function with parameters Create a class that should inherit properties of a parent class (inheritance)

Classes Explained

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