1 is a misconception. Go channels are fundamentally useless for iteration, because you leak goroutines with break or return inside the loop. Same goes for 3 pro

1 is a misconception. Go channels are fundamentally useless for iteration, because you leak goroutines with break or return inside the loop. Same goes for 3 probably. 2 and 4 are the idiomatic ways (and afaict the only ones used in the stdlib). edit: Okay, 3 should work too, sorry.