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|
.. _arduino-goto:
goto
====
Transfers program flow to a labeled point in the program
Syntax
------
label:
goto label; // sends program flow to the label
Tip
---
The use of *goto* is discouraged in C programming, and some authors
of C programming books claim that the *goto* statement is never
necessary, but used judiciously, it can simplify certain programs.
The reason that many programmers frown upon the use of *goto* is
that with the unrestrained use of *goto* statements, it is easy to
create a program with undefined program flow, which can never be
debugged.
With that said, there are instances where a goto statement can come
in handy, and simplify coding. One of these situations is to break
out of deeply nested *for* loops, or *if* logic blocks, on a
certain condition.
Example
-------
::
for(byte r = 0; r < 255; r++){
for(byte g = 255; g > -1; g--){
for(byte b = 0; b < 255; b++){
if (analogRead(0) > 250){ goto bailout;}
// more statements ...
}
}
}
bailout:
|
