JuniorTheoryCommon

What happens when this program is compiled and run?

SWIFT

let unread = 3
if unread {
    print("new mail")
} else {
    print("no mail")
}

It does not compile

Expecting new mail because a non-zero number counts as true, as in C or JavaScript. In Swift a condition must be a Bool; write unread != 0.
Expecting the program to stop only when it reaches the if line. The compiler checks the condition's type before the program starts, so nothing runs.

JuniorTheoryCommon

SWIFT

let unread = 3
if unread {
    print("new mail")
} else {
    print("no mail")
}

It does not compile

Expecting new mail because a non-zero number counts as true, as in C or JavaScript. In Swift a condition must be a Bool; write unread != 0.
Expecting the program to stop only when it reaches the if line. The compiler checks the condition's type before the program starts, so nothing runs.