Basic coin flipper program - logical error help

[John McMonagle]

On Tue, 2006-02-21 at 16:14 -0800, DannyB wrote:
> I'm just learning Python.  I've created a simple coin flipper program -
> here is the code:
> 
> [source]
> #Coin flipper
> import random
> 
> heads = 0
> tails = 0
> counter = 0
> 
> coin = random.randrange(2)
> 
> while (counter < 100):
>     if (coin == 0):
>         heads += 1
>         counter += 1
>     else:
>         tails += 1
>         counter += 1
> 
> coin = random.randrange(2)
> 
> 
> print "\nThe coin landed on heads", heads, "times."
> print "\nThe coin landed on tails", tails, "times."
> [/source]
> 
> <<<I'm sure the [source] tags don't work - I through them in there
> anyway.>>>
> 
> The program runs - however - it will give me 100 heads OR 100 tails.
> Can someone spot the logic error?  

Yes.  Put coin = random.randrange(2) inside the while loop.

import random

heads = 0
tails = 0
counter = 0

coin = random.randrange(2)

while (counter < 100):
    if (coin == 0):
        heads += 1
        counter += 1
    else:
        tails += 1
        counter += 1

    coin = random.randrange(2)

print "\nThe coin landed on heads", heads, "times."
print "\nThe coin landed on tails", tails, "times."


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