On 20/04/15 08:44, Jim Mooney wrote:
I can't seem to get my head around this 'simple' book example of binary-to-decimal conversion, which goes from left to right:B = '11011101' I = 0 while B: I = I * 2 + int(B[0]) B = B[1:]
...
Both methods work but I just can't see how the first one does.
The key is that the result gets multiplied by 2 each time so for an N bit number the leftmost digit winds up being effectively 2**N, which is what you want. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
