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Learn more about Teams //about 10 more types Transaction.Type.BLOCKED -> { if (transaction.type == Transaction.Type.BLOCKED && transaction.closeAnyway) { close(transaction) break //close if type is blocked and has 'closeAnyway' flag //common logic //other types

I cannot write break :

'break' and 'continue' are not allowed in 'when' statements. Consider using labels to continue/break from the outer loop.

Is it a way to return/break from when statements? Or what is the best way to solve it?

I think I agree that break functionality would be nice (though you could always do the if/else thing). Just suggesting a workaround until such time as the Kotlin team decided to implement (or not). – Oliver Dain Jan 31, 2017 at 19:03 //about 10 more types Transaction.Type.BLOCKED -> run { if (transaction.type == Transaction.Type.BLOCKED && transaction.closeAnyway) { close(transaction) return@run //close if type is blocked and has 'closeAnyway' flag //common logic //other types that's odd @IgorGanapolsky, you may need ask a question on SO if you still have the issue when trying to create a minimal, reproducible example it should work, here is a Kotlin Playground link to demonstrate run + return@run : pl.kotl.in/yBP4E8ycc – mfulton26 Sep 25, 2020 at 18:46

You can use labels to break/continue/return. e.g.:

transactions@ for (transaction in transactions) {
    when (transaction.state) {
        Transaction.Type.EXPIRED,
        Transaction.Type.BLOCKED -> {
            break@transactions
See Returns and Jumps - Kotlin Programming Language for more details.
                Good workaround, but I cannot accept it as the answer because it may be some code after when.
– Boris
                Jan 31, 2017 at 20:24
                @Feeco. Thank you. I think I slightly misunderstood your question. I'll post another answer.
– mfulton26
                Jan 31, 2017 at 20:36
        //about 10 more types
        Transaction.Type.BLOCKED -> {
            if (type == Transaction.Type.BLOCKED && closeAnyway) {
                close(this)
                return@apply
            //common logic
        //other types
        
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