Editing Do while loop (section)

===BASIC===
{{Further|BASIC}}
Early BASICs (such as [[GW-BASIC]]) used the syntax WHILE/WEND. Modern BASICs such as [[PowerBASIC]] provide both WHILE/WEND and DO/LOOP structures, with syntax such as DO WHILE/LOOP, DO UNTIL/LOOP, DO/LOOP WHILE, DO/LOOP UNTIL, and DO/LOOP (without outer testing, but with a conditional EXIT LOOP somewhere inside the loop). Typical BASIC source code:

<syntaxhighlight lang="vbnet">
Dim factorial As Integer
Dim counter As Integer

factorial = 1
counter = 5

Do
    factorial = factorial * counter
    counter = counter - 1
Loop While counter > 0

Print factorial
</syntaxhighlight>