KtKotlinIntermediateEditable example14 min

When Expressions

When Expressions in practical Kotlin programs, with editable notebook code and a focused exercise.

Lesson notes

This lesson turns when expressions into a small example you can edit, copy and run locally.

null safetyclassesbackend patterns

Editable notebook cell

Starter code

fun main() {
    val name = "Ada"
    println("Hello $name")
}

Output

Editable example

Expected output:
Hello Ada

Live execution for this language is coming soon. You can edit, copy and run this code locally.

Try this

Change the sample data, predict the output and note what concept changed.

Hint: Make the smallest possible edit first.