bash "let" barfs on addition
evuraan at gmail.com
Fri Mar 13 18:31:50 UTC 2009
Yes, I now see that bc gave the correct answer, as a signed int though:
$ printf "%u\n" -6246583658587674878
thank you all for the replies.!
2009/3/12 Evuraan::ഏവൂരാന് <evuraan at gmail.com>:
> Greetings y'all..!
> Seen this sort of behaviour before? :
> mybash:> a="7540113804746346429"
> mybash:> b="4660046610375530309"
> mybash:> let c=(a+b)
> mybash:> echo $c
> The correct answer should have been: 12200160415121876738
> mybash:> echo "$a+$b" |bc -l
> mybash:> bash --version
> GNU bash, version 3.2.25(1)-release (i486-pc-linux-gnu)
> Copyright (C) 2005 Free Software Foundation, Inc.
> I know, I can use bc,dc,awk, python and even a desk calculator wide
> enough :) - but, I am curious as to why is "let" letting us down?
> Does a known bug exist already?
> Any input would be much appreciated, many thanks in advance.!
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