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KotlinIntroduction & Core Concepts

50 items

1

Printing Output

Quiz
2

The main Function

Quiz
3

Function Declaration

Quiz
4

Basic Data Types

Quiz
5

Optional Semicolons

Quiz
6

What Kotlin Is

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7

Null Safety Basics

Quiz
8

Parameters and Return Types

Quiz
9

String Templates

Quiz
10

Type Inference

Quiz
11

val vs var

Quiz
12

Kotlin and Java Interop

Quiz
13

Basic Loops

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14

Comments in Kotlin

Quiz
15

if as an Expression

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16

when Expression Basics

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17

C-style for loop

Code Quiz
18

Statements on one line

Code Quiz
19

if as an expression

Code Quiz
20

String template property

Code Quiz
21

Comment syntax

Code Quiz
22

Single-expression function

Code Quiz
23

val vs var

Code Quiz
24

Char literals

Code Quiz
25

Explicit type mismatch

Code Quiz
26

The fun keyword

Code Quiz
27

Type inference

Code Quiz
28

Return type mismatch

Code Quiz
29

Console output typo

Code Quiz
30

when as an expression

Code Quiz
31

Inclusive vs exclusive ranges

Code Quiz
32

Unit return type

Code Quiz
33

The main entry point

Code Quiz
34

Assigning null

Code Quiz
35

Optional Semicolons

Flashcard
36

Basic Data Types

Flashcard
37

Type Inference

Flashcard
38

Java Interoperability

Flashcard
39

Arithmetic and Comparison Operators

Flashcard
40

Comments in Kotlin

Flashcard
41

String Templates

Flashcard
42

Everything Is an Object

Flashcard
43

The main() Function

Flashcard
44

val vs var

Flashcard
45

Kotlin Compilation Targets

Flashcard
46

What Kotlin Is

Flashcard
47

Concise, Expressive Syntax

Flashcard
48

Reading Input with readLine()

Flashcard
49

Explicit Type Annotations

Flashcard
50

println vs print

Flashcard
Code QuizBeginner

Assigning null

See why a non-nullable type cannot hold null.

Codekotlin
fun main() {
    var name: String = null
    println(name)
}

What is the bug in this code?