While True

        See "
                Main Menu
                ---------
                (1) Say Hello
                (2) About
                (3) Exit

            " Give nOption

        Switch nOption
        On 1
                See "Enter your name : "
                Give name
                See "Hello " + name + nl
        On 2
                See "Sample : using while loop" + nl
        On 3
                Bye
        Other
                See "bad option..." + nl
        Off
End
