Changes between Version 65 and Version 66 of ControlSystems/SoftwareTeam/IntroToPython

Timestamp:

Sep 4, 2017, 9:49:28 PM (8 years ago)

Author:

cdelgigante

Comment:

--

ControlSystems/SoftwareTeam/IntroToPython

@@ -267 +267 @@
 }}}
 
-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?  That's not right.   Modify the program so it behaves correctly if an age of 1 is used.   
-
-
-Now your turn...  In the 'That's-a big number exercise above" make a function called inputNumber, and modify it to use that instead of the while-not stuff.  Much easier to read, no?
-
+Run this one.  What does it output?  A lovely happy birthday song for two kids?   Now imagine if you had to write a program to print out a happy birthday for every single person in your grade without it.  It'd get pretty ugly, fast.
+
+`def` is used in Python to indicate a custom function, and you have to ''def''ine it in your program before you use it.  It takes an argument of an age, and second argument of a list of names.  The "singHappyBirthday" line actually ''calls'' the custom function, with the two arguments it needs. 
+
+A function can return a value, by using the Python keyword `return` as in:
+
+{{{
+def isOver9000(power):
+   if power>9000:   # you could also express this if-then-else statement as "return power>9000"
+     return True
+   else: 
+     return False
+ 
+isGokuPowerfulEnough = isOver9000(9001)
+print(isGokuPowerfulEnough)
+}}}
+
+Now your turn...  In the 'That's-a big number exercise above" make a function called inputNumber, and modify it to use a custom function rather than the while-not stuff.  Much easier to read, no?
+
+Here's the [[ThatsaBigNumberSolution|solution]]