Basic Micro Studio Syntax Manual

WHILE - WEND
Syntax
while condition
program statements
wend
• Condition - can be a variable or expression
• Statements - any group of commands to be run inside the loop.
Supported
• BA - Supported.
• BAN - Supported.
• BAP - Supported.
• BAP40 - Supported.
Commands
Description
The WHILE - WEND loop executes commands nested inside of it while some condition is true. The
condition is tested before the WHILE - WEND loop is run. This is opposite of DO - WHILE which will
test the condition for true after running once. The condition can be any variable or expression and is
tested every loop until false. A simple example would be using the WHILE - WEND loop to test the
state of an input pin. If the pin is low “go do something” until pin is high.
Notes
1. In the programming world 0 is considered false. By default WHILE - WEND will test this condition.
If a stand alone variable is used for the test the loop will continue until its value equals 0.
2. WHILE - WEND checks the condition fi rst. If the condition is false the WHILE - WEND statements
and all program code nested within them will not run.
3. You can nest multiple WHILE - WEND commands within each other. However, you can not nest
DO - WHILE with a WHILE - WEND together or the compiler will get the WHILE statements
confused.
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