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<h2><font color="black"><a name="htoc28">2.12</a>&nbsp;&nbsp;Choosing mnemonic variable names</font></h2>
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<font color="black">As long as you follow the simple rules of variable naming, and avoid
reserved words, you have a lot of choice when you name your variables.
In the beginning, this choice can be confusing both when you read a 
program and when you write your own programs. For example, the
following three programs are identical in terms of what th