Difference between revisions of "How to use while & for loops"
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Revision as of 21:25, 4 April 2012
COMP 1010 Home > Back to Extra Labs
IntroductionIn this program, you will be learn how to use 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 shown below does the following shows |
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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
