Control flow

Conditions

if Score > 10 {
    return 1;
} else {
    return 0;
}

Conditions use braces and do not require outer parentheses. The condition must be a bool.

Loops

for var Index: usize = 0; Index < Count; Index += 1 {
    Update(Index);
}

while Running {
    Tick();
}

These fragments assume their input bindings and functions. Sn also provides iterator-style for Item in Items.

Ranges

Start..End excludes End. Start..=End includes End when reached exactly. Ranges evaluate their bounds once; integer range bounds must have compatible types.

Value-producing blocks

let Normalized: i32 = {
    if Input < 0 {
        break 0;
    }
    break Input * 2;
};

This fragment assumes Input: i32. break Value; supplies a value to the nearest value-producing construct. return always returns from the surrounding function.