There are three main types of loops for QBasic. The loops are the While, Do Loop, and For loop. This tutorial will show the Do Loop.

Warning
Make sure that the loop has a condition that will end the loop. If there is not a condition to end the loop, the computer will be sent through an infinite loop. Sometimes, using CTRL BREAK (QBasic 1.1) can end the infinite loop.

Do Loop Syntax

The Do Loop with the condition at the start of the loop.

Do (While/Until) [condition]
   [Statement Block]
Loop

The Do Loop can have the condition at the end of the loop.

Do
   [Statement Block]
Loop (While/Until) [condition]

Code Download
QBT10_1.BAS
QBT10_2.BAS
QBT10_3.BAS
QBT10_4.BAS