擅长:python、mysql、java
<pre><code>while True:
try:
userlow = int(raw_input('num please'))
userhigh = int(raw_input('num please'))
loopmult = int(raw_input('enter a num please'))
if userlow < userhigh:
break
except ValueError:
print 'ERROR: Integer only'
</code></pre>
<p><a href="http://docs.python.org/tutorial/errors.html#handling-exceptions" rel="nofollow">http://docs.python.org/tutorial/errors.html#handling-exceptions</a></p>