Constant values with const val in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a constant integer named MAX_COUNT with value 100.

Kotlin

const val MAX_COUNT: Int = [1]

Drag options to blanks, or click blank then click option'

A"100"

B100

CMAX

Dval

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around numbers, which makes them strings.

Trying to assign a variable name instead of a value.

The keyword const val declares a compile-time constant. Here, MAX_COUNT is assigned the integer value 100.

2fill in blank

medium

Complete the code to declare a constant string named APP_NAME with value "MyApp".

Kotlin

const val APP_NAME: String = [1]

Drag options to blanks, or click blank then click option'

AMy_App

BMyApp

C'MyApp'

D"MyApp"

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes instead of double quotes for strings.

Not using quotes at all for string values.

String constants must be enclosed in double quotes in Kotlin. So "MyApp" is correct.

3fill in blank

hard

Fix the error in the constant declaration for PI with value 3.14.

Kotlin

const val PI: Double = [1]

Drag options to blanks, or click blank then click option'

A3.14

B"3.14"

C3,14

Dpi

Attempts:

3 left

💡 Hint

Common Mistakes

Using a comma instead of a dot for decimals.

Putting the number inside quotes, making it a string.

Decimal numbers use a dot . as the decimal separator in Kotlin. The value must be a number, not a string.

4fill in blank

hard

Fill both blanks to declare two constants: MAX_SPEED as 120 and MIN_SPEED as 0.

Kotlin

const val MAX_SPEED: Int = [1]
const val MIN_SPEED: Int = [2]

Drag options to blanks, or click blank then click option'

A120

B100

C0

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the values between MAX_SPEED and MIN_SPEED.

Using incorrect numbers like 100 or -1.

Constants are assigned their values directly. Here, MAX_SPEED is 120 and MIN_SPEED is 0.

5fill in blank

hard

Fill all three blanks to declare constants: PI as 3.1415, E as 2.718, and GREETING as "Hello".

Kotlin

const val PI: Double = [1]
const val E: Double = [2]
const val GREETING: String = [3]

Drag options to blanks, or click blank then click option'

A3.1415

B2.718

C"Hello"

D"Hi"

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings for numeric constants.

Using wrong string values for GREETING.

Assign the correct numeric values for PI and E as doubles, and the string "Hello" for GREETING.