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QuickBASIC is a GW-Basic-like platform developed by Microsoft.

Hello World[]

Here is a Hello World program written in QuickBASIC:

CLS
PRINT "Hello World"

As QuickBASIC programs run in a DOS environment, the CLS command is generally used as the first line to remove clutter from the output screen caused by previous runs. The PRINT command then simply displays its arguments on the screen.

Syntax reference[]

The following commands used in QuickBASIC are organized by type.

Program flow[]

Declarations[]

Device I/O[]

  • PRINT
  • PRINT USING
  • LPRINT
  • INPUT

File I/O[]

String functions[]

  • LEFT
  • MID
  • RIGHT
  • LEN
  • INSTR

Arrays[]

  • DIM
  • REDIM

Graphics[]

  • SCREEN
  • DRAW
  • COLOR
  • PALETTE
  • PAINT

Error handling[]

  • ON KEY GOSUB
  • ON ERROR GOTO
  • RESUME

Data Types[]

Data Type Maximum Size Symbol
INTEGER -32,767 to 32,768 %
LONG -2,147,483,648 to 2,147,483,647 &
SINGLE +/-1.401298 * 10^-45 to +/-3.402823 * 10^38 !
DOUBLE +/-4.940656 * 10^-324 to +/-1.7976931 * 10^308 #
STRING 32,767 characters $

Dialects derived from QuickBasic[]

There is a dialect that is mostly compatible with Quickbasic called FreeBASIC, which supposedly is Linux and Windows compatible.

References[]

  1. Wikipedia's QuickBASIC article
  2. QuickBASIC editor help.
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