Difference between revisions of "How to use while & for loops"
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{{Template:1010ExtraLabs | {{Template:1010ExtraLabs | ||
|Chapter_TOC=[[Extra Labs]] | |Chapter_TOC=[[Extra Labs]] | ||
| − | |Introduction=In this program | + | |Introduction=In this program you will learn how to use the while and for loop control structures in Python. |
==while and for loops syntax in Python:== | ==while and for loops syntax in Python:== | ||
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Statement(s) | Statement(s) | ||
| − | The two sample programs | + | The two sample programs below are examples of what typical while and for loops look like. |
|Body= | |Body= | ||
== Sample programs== | == Sample programs== | ||
| − | + | * for loop example | |
{{CodeBlock | {{CodeBlock | ||
| − | |Code= | + | |Code=############################### |
#Prints out all lower case alphabets | #Prints out all lower case alphabets | ||
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| − | + | * while loop example | |
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{{CodeBlock | {{CodeBlock | ||
| − | |Code=############################################ | + | |Code=################################################### |
| − | # | + | # This program ensures that the user enters either of the |
# characters (a, b or c) | # characters (a, b or c) | ||
Latest revision as of 21:26, 4 April 2012
COMP 1010 Home > Back to Extra Labs
IntroductionIn this program you will learn how to use the while and for loop control structures in Python. while and for loops syntax in Python:while (expression): Statement(s) for iterating_var in sequence: Statement(s) The two sample programs below are examples of what typical while and for loops look like. |
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Sample programs
- for loop example
###############################
#Prints out all lower case alphabets
letter = 'a'
for i in range (0,26):
print letter
letter = chr(ord(letter) + 1)
- while loop example
###################################################
# This program ensures that the user enters either of the
# characters (a, b or c)
## Gets input from th user
message = raw_input("Please enter a, b, or c: ")
while(message != "a" and message != "b" and message != "c"):
message = raw_input("Please enter a, b, or c:")
print "You entered: " + message
