Kotlin Academy · Lesson

while and do-while: When to Use Each

Write while and do-while loops and understand their use cases.

Two Kinds of While Loops

Kotlin offers both while (pre-test) and do-while (post-test). The difference: do-while always runs the body at least once.

A while checks the condition before each iteration. If false initially, the body never runs.

fun main() {
    var count = 0
    while (count < 3) {
        println("count = $count")
        count++
    }
}