Boston Python Workshop 3/Friday/Tutorial: Difference between revisions

You can use the <code>else</code> keyword to execute code only when the <code>if</code> expression isn't true:

====even more choices: <code>elif</code>====

If you have more than two cases, you can use the <code>elif</code> keyword to check more cases. You can have as many <code>elif</code> cases as you want; Python will go down the code checking each <code>elif</code> condition until it finds a true condition or reaches the default <code>else</code> block.

<pre>

sister_age = 15

brother_age = 12

if sister_age > brother_age:

print "sister is older"

elif sister_age == brother_age:

print "sister and brother are the same age"

else:

print "brother is older"

</pre>

You don't have to have an <code>else</code> block, if you don't need it:

<pre>

color = "orange"

if color == "green" or color == "red":

print "Christmas color!"

elif color == "black" or color == "orange":

print "Halloween color!"

elif color == "pink":

print "Valentine's Day color!"

</pre>