I don't know what the output code is. The compiler says there is an invalid character in identifier of line 3
<pre><code>b = 0
for a in range(0, 10, 2):
    b += a − 1 
print(a," ",b)
</code></pre>

<p>I am practicing on a past paper. Please help. And can someone please explain 
the break and continue functions.</p>