Basic Micro Studio Syntax Manual

REPEAT - UNTIL
Syntax
repeat
program statements
until condition
• Statements - any group of commands to be run inside the loop.
• Condition - can be a variable or expression
Supported
• BA - Supported
• BAN - Supported
• BAP - Supported
• BAP40 - Supported
Commands
Description
The REPEAT - UNTIL loop executes commands nested inside of it until some condition is false. This
is the opposite of DO - WHILE and WHILE - WEND. The condition can be any variable or expression
and is tested every loop until true.
Notes
1. In the programming world 0 is considered false. By default REPEAT - UNTIL will test this condition.
If a stand alone variable is used for the test, the loop will continue until it’s value NOT equal to 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 REPEAT - UNTIL commands within each other. You can nest DO - WHILE or
WHILE - WEND loops within a REPEAT - UNTIL loop.
Example
Connect to the following program with the terminal window set to 9600 baud. The program will start
counting up from 0 to 100. Once the index reaches a value of 101, the condition is no longer false.
The greater than symbol (>) was used for the condition and 101 is now greater than 100 making the
condition true. Since REPEAT - UNTIL loops while a statement is false the program will now exit.
;ALL - all_repeat_until.bas
Index var word
Main
End
Index = 0
Repeat
index = index + 1
;lets print the value index
serout s_out, i9600,[0, “Couting: “, dec index]
pause 75
Until index > 100 ;run until index is greater than 100
serout s_out, i9600, [13,13, “Index = “, dec index]
serout s_out, i9600, [13, “My condition is no longer false.”]
serout s_out, i9600, [13, “Index is now greater than 100”]
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