You can use comments to help with the debugging of your functions. You can use comments to temporarily have the compiler ignore blocks of statements by changing them to comments. C style and C++ style comments can be nested, for example.
IncCounter ( )
IF COUNTER < 100 THEN
COUNTER = COUNTER + 1 ;
/* ELSE // Comment about statement
COUNTER = 0; // Another comment
The complete ELSE condition of the IF conditional executor will be ignored (and not execute) so long as the block comment markers are used in this example.
Note: The inline ( // ) comments have no effect within the block ( /* and */ ) comments (as the whole section is now one big comment), and should remain unchanged, so that when you do remove the block comments, the inline comments will become effective again.