Choices

Exercise 1: Even Odd

Write a program that takes an integer input and prints whether it is even or odd.

Exercise 2: Larger

Write a program that takes two integers as input and prints the larger of the two.

Exercise 3: Maximum

Write a program that takes three integers as input and prints the largest of the three.

Exercise 4: Vowel or Consonant

Write a program that takes a character input and prints whether it is a vowel or a consonant.

In this example, we use the match expression to match the input character against a set of patterns to check if it is a vowel or consonant We use the match to return a 'Vowel' or a 'Consonant'.

Exercise 5: Weekend

Write a program that takes a day of the week as input and prints whether it is a weekday or a weekend day.

In this example, we use the match expression to match the input day against multiple patterns. If the input is "Saturday" or "Sunday", the code in the first block will execute and return "Weekend". Otherwise, the code in the last block will execute and return "Weekday".

Exercise 6: Number name

Write a program that takes an integer input and prints its English name. For example, if the input is 2, the program should print "two".

Solutions

Exercise 1: Even Odd

val x: Int = 10
val result = 
if x % 2 == 0 then "Even"
else "Odd"

println(result)

Exercise 2: Larger

val x: Int = 10
val y: Int = 20

val larger: Int = if x > y then x else y
println(s"The larger number is $larger.")

Exercise 3: Maximum

val x: Int = 10
val y: Int = 20
val z: Int = 15

val largest: Int = if x > y && x > z  then
  x
else if y > z then 
  y
else 
  z

println(s"The largest number is $largest.")

Exercise 4: Vowel or Consonant

val ch: Char = 'a'

val result: String = ch match 
  case 'a' | 'e' | 'i' | 'o' | 'u' => "Vowel"
  case _ => "Consonant"

println(result)

Exercise 5: Weekend

val day: String = "Saturday"

val result: String = day match 
  case "Saturday" | "Sunday" => "Weekend"
  case _ => "Weekday"

println(result)

Exercise 6: Number name

val x: Int = 4

val result: String = x match 
  case 1 => "one"
  case 2 => "two"
  case 3 => "three"
  case 4 => "four"
  case 5 => "five"
  case 6 => "six"
  case 7 => "seven"
  case 8 => "eight"
  case 9 => "nine"
  case _ => "invalid"

println(result)