function hello(name: string) :void {
    console.log("Hello " + name);
    }
    var firstName = "bob";
    hello(firstName);
    hello(firstName + " marley");
    function concat(a : string, b : string): string {
    return a + b;
    }
    var wcs = concat("Wild", concat("Code ", "School"));
    console.log(wcs);