Boston Python Workshop 8/Friday/Tutorial: Difference between revisions

← Older edit

Boston Python Workshop 8/Friday/Tutorial (view source)

Revision as of 23:05, 12 July 2013

73 bytes added , 10 years ago

→‎more choices: if and else

Anonymous user

18.111.82.171

Revision as of 14:38, 12 July 2013 (view source) imported>Jesstess (→‎compound conditionals: and and or) ← Older edit		Latest revision as of 23:05, 12 July 2013 (view source) 18.111.82.171 (talk) (→‎more choices: if and else)
(6 intermediate revisions by 2 users not shown)
Line 281: fish = "humuhumunukunukuapuaʻa" name_length = len(fish) fish + " is a Hawaiian fish whose name is " + str(name_length) + " characters long.") </pre> Line 558: ====more choices: <code>if</code> and <code>else</code>==== <b><code>if</code></b> ~~let's~~lets you execute some code only if a condition is <code>True</code>. What if you want to execute different code if a condition is <code>False</code>? Use the <b><code>else</code></b> keyword, together with <code>if</code>, to execute different code when the <code>if</code> condition isn't <code>True</code>. Try this: Line 619: ====even more choices: <code>elif</code>==== If you ~~have~~need to execute code conditional based on more than two cases, you can use the <b><code>elif</code></b> 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> until it finds a <code>True</code> condition or reaches the default <code>else</code> block. <pre> Line 632: </pre> You don't have to have an <code>else</code> block, if you don't need it. That just means there isn't default code to execute when none of the <code>if</code> or <code>elif</code> conditions are <code>True</code>: <pre>