[ShamelessC]

It's actually more curious that they didn't have iterator style loops from the beginning. It's a pretty standard feature in newer languages and even plenty of older languages are adding support for it.

[NobodyNada]

Swift had iterator-style loops from the beginning. It also initially supported C-style "for (i = 0; i < j; i++)" loops, but they were removed very early on (because in practice, they're rarely used for anything except iteration, and iterator-style loops are much more readable and less error-prone).

[jmnicolas]

I never looked at Swift, but for example how do you wright 10 times "hello world" on the command line if you don't have for loops ?

You could do it with a while loop (if it exists in Swift) but I'm at a loss as to why you would remove a for loop from a programming language.

[NobodyNada]

Iterator-style loops are much clearer and more concise in almost all cases. In this case you can iterate over a range:

    for i in 0..<10 {
        print(i)
    }