On 21/05/14 11:32, 1 2 wrote:
Hi there,
As shown in the codes below, I want to end the loop until the s is no
greater than -5 but I found there is no "do... loop until..." like C so
what should I do? I will write it in C's style
Normally you just reverse the logic and use a
while loop instead.
s,n = 0,1
do:
import math
s=s+(math.log((n+1)/(n+2))/math.log(2))
loop until s < -5
import math
s = 100 # or whatever
while s >= -5:
s = .....
print(s)
But that doesn't work if the variant can not be suitably
initialized before the loop starts - as is the case here.
So instead you can use a while True with a break condition:
import math
s,n = 0,1
while True:
s = ...
if s < -5: break
hth
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.flickr.com/photos/alangauldphotos
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