I have two questions about specific commands in python.

When I run my programs in DOS, right after the program is finished, DOS closes- how do I avoid that? is there a command that will keep the window open? a pause of sorts?

The second question is about while loops. I have a while loop imbedded within another while loop. When the inside while loop becomes false, it displays a message- but then continues with the outside loop- what can I do if I just want the program to end when the inside loop is false?

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First question:

You can use raw_input() to "pause" and keep the window open. This function prints its argument to the screen and waits for user input. For example, if I wanted to keep a dos prompt open, I might have as my last line of the program:

raw_input('Press <enter> to continue")

Second question:

breaking out of your outer loop is simple. just set a flag in your inner loop, and if the flag is true, break out of your outer loop. for example,

fBreak = False
for x in range(10):
....for y in range(10):
........sum = x + y
........if sum > 15:
............fBreak = True
............break
....if fBreak:
........break

Notes:
i use dots to represent spaces since this forum strips spaces from your text and i have not discovered a way to prevent that from occurring.

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First answer:
why don't you use a Batch file to run your program?
Or, you can try to use a function to run the DOS command "pause", but it wouldn't be very pretty.

Second answer:
I don't know what you're willing to do with your loops, but I'm sorry to inform that I'm almost sure that you're doing it wrong.

You're doing this:

while condition1 :
while condition2 :
commands

But I think you're willing to do:

if condition1 :
while condition2 :
commands

or even:

while condition1 & condition2 :
commands

Regards.

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