
<a name="@default97"></a>
<a name="@default98"></a><br />
<br />
The runtime error you are most likely to make is a "use before
def;" that is, trying to use a variable before you have assigned
a value. This can happen if you spell a variable name wrong:
</font><pre><font size="4" color="blue">
&gt;&gt;&gt; principal = 327.68
&gt;&gt;&gt; interest = principle * rate
NameError: name 'principle' is not defined
</font></pre><font color="black">Variables names are case sensitive, so <tt>LaTeX</tt> is not the
sa