Instruments - iOS Programming: The Big Nerd Ranch Guide - page 585

The code path shown by the analyzer lines is as follows:
1. The variable count is created and not initialized.
2. The if statement fails, so count does not get a value.
3. The variable count is returned without being assigned a value.
You can fix this issue by initializing count to zero.
- (int)numberOfLines
{
int count;
int count = 0;
// Check that they are non-nil before we add their counts...
if (linesInProcess && completeLines)
count = [linesInProcess count] + [completeLines count];
return count;
}
Analyze this code again, and no issues will be reported now that count is always initial-
ized with a value.
When you analyze your code (which you will do on a regular basis because you are a
smart programmer), you'll see issues other than the one described here. Many times, we
see novice programmers shy away from analyzer issues because of the technical language.
Don't do this. Take the time to expand the analysis and understand what the analyzer is
trying to tell you. It will be worth it for the development of your application and for your
development as a programmer.