Hi David,
Simple explanation - you should use if instead of while. A while
statement executes whatever is in that block again and again until
the condition becomes false. So your code, the way you have it, first
checks if the user's input is not -1. If you have typed Lary, it goes
on to print Lary, hits the end of the while block, and starts back at
the top, since choice still is not -1. If you change while to if, the
statement will only be executed once.
Here's a scenario you might want to use a while loop (which might be
what you were trying to do): suppose you want to keep on asking for
input if the input is not a quit code, or valid input. To do this,
you could just put the choice = raw_input line inside the while
block, and perhaps make sure to initialize choice to '' (an empty
string or something).
Vivek
On Aug 2, 2008, at 10:21 PM, David wrote:
David wrote:
Very new to python and never programed before. Can not figure out
why the output never stops when I run this in a terminal
#!/usr/bin/python
choice = raw_input("Enter the name Lary or Joan (-1 to quit): ")
while choice != '-1': person = {'Lary': 43,'Joan': 24}
if choice == 'Lary':
print "Lary's age is:", person.get('Lary')
elif choice == 'Joan':
print "Joan's age is:", person.get('Joan')
else:
print 'Bad Code'
should have been like this;
#!/usr/bin/python
choice = raw_input("Enter the name Lary or Joan (-1 to quit): ")
while choice != '-1': person = {'Lary': 43,'Joan': 24}
if choice == 'Lary':
print "Lary's age is:", person.get('Lary')
elif choice == 'Joan':
print "Joan's age is:", person.get('Joan')
else:
print 'Bad Code'
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