### 5.40 Input

• Input( <message> [, title, string] ).
• Description: the function opens a dialog box with <title> in the title bar (empty by default), in which the parameter <message> is displayed, the parameter <string> is displayed in the input area. Those parameters are interpreted as strings, the user is asked to type an input. If the user validate then the function Input returns $1$ and the inputed string is stored in the macro chaine(). If the user does not validate or if the string is empty, thent the function Input returns $0$.
• Exemple(s): see the function Eval.