4. Functions

 

Basic Task

1. Create a new Kotlin file.
2. Copy and paste the main() function from Hello World into the file.
3. Create a new function, dayOfWeek().
4. In the body of the function, print "What day is it today?"
5. Call dayOfWeek() from main().
6. Run your program.

fun main(args: Array,) { dayOfWeek() }

Extended Task

In the body of the dayOfWeek() function, answer the question by printing the current day of the week.

Hints

• You can use Java libraries (java.util) from Kotlin. For example, to get the day of the week:

Calendar.getInstance().get(Calendar.DAY_OF_WEEK) 

• Type in the code, then press Option + Enter in Mac, or Alt + Enter in Windows, over the red Calendar class to import the library.
• Use a when statement to print a string depending on the day. Sunday is the first day of the week.

fun dayOfWeek() { println("What day is it today?") val day = Calendar.getInstance().get(Calendar.DAY_OF_WEEK) println( when (day) { 1 -> "Sunday" 2 -> "Monday" 3 -> "Tuesday" 4 -> "Wednesday" 5 -> "Thursday" 6 -> "Friday" 7 -> "Saturday" else -> "Time has stopped" }) }