Scope exercises - Revision history

Admin at 02:07, 28 February 2011

2011-02-28T02:07:31Z

Admin at 02:06, 28 February 2011

2011-02-28T02:06:56Z

Admin at 02:06, 28 February 2011

2011-02-28T02:06:13Z

Admin at 02:05, 28 February 2011

2011-02-28T02:05:45Z

Admin: Created page with "''Variable scope'' --Exercise A-- Copy the following code: # obtain last name from user def getLastName(): last_name=raw_input("What's your ..."

2011-02-28T02:02:20Z

Created page with "''Variable scope'' --Exercise A-- Copy the following code: <syntaxhighlight lang="Python"> # obtain last name from user def getLastName(): last_name=raw_input("What's your ..."

New page

''Variable scope''

--Exercise A--
Copy the following code:

<syntaxhighlight lang="Python">
# obtain last name from user
def getLastName():
last_name=raw_input("What's your last name?")

# create a full name from the first and last names
def combineName():
full_name=first_name+" "+last_name
print_name()

#Print user's name
def print_name():
print "User's full name:"+full_name

first_name=raw_input("What's your first name?")
getLastName()
combineName()
</syntaxhighlight>

# What is the scope of the following variables
##last_name
##first_name
##full_name?
# Ensure last_name is transferred from getLastName() to the default scope
# What argument needs to be passed to print_name()?
# Add a new '''function''' that asks "Are you (j)junior, (s)senior or (n) neither?", and determines the correct suffix ("Jr.", "Sr.")
# Modify the combineName function so the suffix is added to full_name

--Exercise B--
* Create a new program
* Define two variables, 'x' and 'screen_width'
* Set screen_width to 800
* Ask the user for 'x'

* Write a function that performs the screen wrapping you created in Robot :
If the input is greater than screen width, set it to 0
If the input is less than 0 then set it to the screen width

* Add code to print x before and after the function is called
* Test the code with several sample values
* Extend the wrapping function so that it also works with the y-coordinate
* How can we return two variables (x and y co-ordinates)?

@@ Line 35: / Line 35: @@
 * Set screen_width to 800
 * Ask the user for a value for 'x'
+* Write a function that performs screen wrapping(as in 'Robot'): <br/> If the input is greater than screen width, set it to  0 <br/> If the input is less than 0 then set it to the screen width
 * Add code to print 'x' before and after the function is called
 * Test the code with several sample values - make sure it works.
 * Extend the wrapping function so that it also works with the y-coordinate
 ** Don't create a second function. Instead work out how to return two variables.

@@ Line 1: / Line 1: @@
-=Exercise A=
+==Exercise A==
 Fix the following buggy code:
@@ Line 30: / Line 30: @@
 # Modify the combineName function so the suffix is added to full_name
-=Exercise B=
+==Exercise B==
-* Create a new program
+Create a new program:
 * Define two variables, 'x' and 'screen_width'
 * Set screen_width to 800