Flow

Control flow in elz is only two ways(but maybe have macro extend the statement, it sounds good, I hope that will became true, too)

One is match.

let i = 1
match i {
  1 => println("One"),
  _ => println("What is this?"), // The end of match can add , or not. It's optional.
}

You should see "One" print out.

Second is loop.(I am preparing design the condition of loop statement, hope it can suit more situations)

let mut i: num = 0
let n = 100
loop {
    match i {
        n => break, // can be found at this scope, so would not be binding value
        k => { // binding the remained value
            i += 1
            println("{i}")
        }
    }
}
// print 0 .. 99

As you see, if match doesn't match a exist value or reference, it will binding value onto that ref name.

And as you see at ~~[previous section](/chapter1.md). Match can return a value(I mean it also is an expression).

let mut traffic_light = green
loop {
    traffic_light = match traffic_light { // Start support at nim-elz v0.3.0
        red => green,
        green => yellow,
        yellow => red
    }
}

When => follow a expression.