DECLARE (DCL)

Syntax DECLARE kind name

Explanation

The DECLARE command allows you to create new Logo names, giving a new name a certain type. Logo uses this command internally to create objects of all kinds, like bitmaps, buttons, and turtles. When a new Logo name is declared, Logo creates the name according to its type and stores it into the global workspace.

Currently, Logo knows the following types of names.

ARRAY	a Logo array
BITMAP	a bitmap
BUTTON	a pushbutton
CHECKBOX	a box with a check mark
EDITBOX	a box where you can enter text
EDITOR	an editor window
GRAPHICS	a Graphics window
LISTBOX	a list box
LISTENER	the Listener window
OUTPUT	an output window
POPUP	a pop-up list
RADIOBUTTON	a radio button
SCROLLBAR	a slider
STATICTEXT	a box which displays text
TURTLE	a turtle
WINDOW	all kinds of windows
WORKSPACE	the Logo workspace

When a Logo element is created, it is by default attached to the current Graphics window. A turtle or a button without a window cannot be displayed by Logo. To attach an element to a window, set its WINDOW property to the name of the Graphics window where it should appear.

The NEW command is similar to the DECLARE command.