{{htmlmetatags>metatag-robots=()
metatag-title=(CLS | ugBASIC User Manual)
metatag-keywords=(ugBASIC,Commodore 64,Commodore PLUS/4,ZX Spectrum)
metatag-description=(Manual page for CLS)
metatag-media-og:image=(:ugbasic:logo-ugbasic-fb.png)
metatag-og:title=(CLS | ugBASIC User Manual) 
metatag-og:description=(Manual page for CLS)
}}

====== ugBASIC User Manual ======

===== CLS ✓ =====

===== SYNTAX =====
     CLS
     CLS color

==== PURPOSE ====




The ''CLS'' command is used to clear the screen and return the cursor to the
upper left corner. In other words, ''CLS'' clears the screen, eliminating 
everything that was previously printed. 

Before printing new data to the screen, it is often useful to use ''CLS'' to
have a clean and tidy space. In combination with other instructions, 
''CLS'' can be used to create simple animations by erasing and redrawing 
elements on the screen. It allows you to update the user interface without 
leaving traces of previous operations.

The CLS command is generally very fast to execute and can also be used 
in graphics mode to clear the entire drawing area. It also has
the ability to set a default background color, if possible. The clearing 
occurs with respect to the selected mode, so it will be a "pixel by pixel" 
clearing (if in bitmap mode) or "tile by tile" (if in tile mode). In the 
second case, the value of the ''EMPTYTILE'' variable will be used, 
possibly overridden



==== EXAMPLE ====
    CLS
    CLS WHITE


See also the following example files:
  * ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/texts_position_01.bas|texts_position_01.bas]]''
  * ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/texts_position_02.bas|texts_position_02.bas]]''


==== ABBREVIATION ====
   Cl


==== AVAILABLE ON ====
  * Dragon 32
  * Commodore 128 (Zilog Z80)
  * Commodore 128 (MOS 8502)
  * SEGA SG-1000
  * ZX Spectrum 48
  * Commodore 64
  * Commodore VIC-20
  * Atari (400/800)
  * 
  * Commodore PLUS/4
  * VG-5000
  * Olivetti Prodest PC128
  * Dragon 64
  * Amstrad CPC 664
  * SEGA SC-3000
  * ColecoVision
  * TRS-80 Color Computer 3
  * MSX
  * TRS-80 Color Computer


==== ALIAS FOR ====
[[PCLS]] 

==== ANY PROBLEM? ====
If you have encountered a problem using this command, if you think there is a bug or the explanation is unclear, please [[https://github.com/spotlessmind1975/ugbasic/issues/new?title=ISSUE ON CLS|open an issue]] for this keyword on GitHub. Thank you!===== POWERED BY =====

[[:ugbasic:user:index|{{ :ugbasic:user:logo-ugbasic.png?nolink&600 |}}]]