pub fn main(world: World) -> Void raises {
    let values: [5]i32 = [7, 2, 10, 4, 1]
    var index: usize = 0
    var sum: i32 = 0
    var min: i32 = values[0]
    var max: i32 = values[0]
    while index < 5 {
        let value: i32 = values[index]
        sum = sum + value
        if value < min {
            min = value
        }
        if value > max {
            max = value
        }
        index = index + 1
    }
    if sum == 24 && min == 1 && max == 10 {
        check world.out.write("array sum min max ok\n")
    }
}