Changes between Version 60 and Version 61 of ControlSystems/SoftwareTeam/IntroToPython

Timestamp:

Sep 4, 2017, 8:02:16 PM (8 years ago)

Author:

cdelgigante

Comment:

--

ControlSystems/SoftwareTeam/IntroToPython

@@ -253 +253 @@
 }}}
 
-But wait, there's more...you can create your own functions.  That way if you come up with cool way to do something you dont have to repeat yourself as much.  For instance:
-
+'''But wait, there's more'''...you can create your own functions.  That way, if you come up with cool way to do something you can reuse it and don't have to repeat yourself as much.  For instance:
+
+{{{
+def singHappyBirthday(age, names): # a custom function
+   for name in names:
+      for count in range(0, age):
+         print("Happy Birthday to You!")
+         if count == age-2: 
+           print("Happy Birthday, Dear", name)
+       
+singHappyBirthday(6,['Milla', 'Emma'])  # now use it.
+}}}
+
+Run this one.  What does it output?  A lovely happy birthday song for two kids?   Imagine if you had to write a program to sing happy birthday to all the people in your class without it.  It'd get pretty ugly, fast.
+
+`def` is used to indicate a custom function, and you have to define (that's what def is short for) it in your program before you use it.  It takes an argument of an age, and a list of names.  The "singHappyBirthday" line actually ''calls'' the custom function, with arguments of an age of size and a list of two names. 
+
+
+Now what happens if you try and run it with age equal to 1?  Modify the program it prints out "Aw a baby!' if an age of 1 is used.