#include "foo.hsp"

    // line comment
    message = "Hello, World!"
    message2 = {"Multi
    line
    string"}
    num = 0
    mes message
    
    input num : button "sqrt", *label
    stop
    
*label
    /*
     block comment
    */
    if(num >= 0) {
        dialog "sqrt(" + num + ") = " + sqrt(num)
    } else {
        dialog "error", 1
    }
    stop