How to use while & for loops
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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
