I encourage you to "desk check" your code: pretend you are the computer: write down the values of variables and expressions as things change. Evaluate each statement to see what it does.
Example:
heads tails flip flip < 100 while flip < 100:
0 1 100 False loop not entered
program ends.
I hope you understand why the loop is not entered. If not please (re)read an explanation of while.
Noticing that you would alter the loop condition. To do that you need to ask "When do I want the loop to end?"
Let's say you changed it to: while flip <= 100. Now your "desk check" would look like:
heads tails flip flip <= 100 while flip <= 100:
0 1 100 True loop entered
99
random.randrange(2)
has no effect since nothing is done with the value returned
flip < 100 break
True leaves the loop
print "\nThe amount of times tails came up was" , tails , "The amount of times heads came up was" , heads
results in: The amount of times tails came up was 1 The amount of times heads came up was 0
I hope this helps.
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