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$((1<<64)) = 1
From: |
Paul Jarc |
Subject: |
$((1<<64)) = 1 |
Date: |
Tue, 03 Feb 2004 10:10:33 -0500 |
User-agent: |
Gnus/5.110002 (No Gnus v0.2) Emacs/21.3 (gnu/linux) |
Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i686'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu'
-DCONF_VENDOR='pc' -DSHELL -DHAVE_CONFIG_H -I.
-I/package/misc/spf/bash-2.05b-4/spf/readline/include -I. -I./include -I./lib
-I/nil -I/package/misc/spf/bash-2.05b-4/spf/readline/include
-I/package/misc/spf/bash-2.05b-4/spf/ncurses/include -O2 -pipe
uname output: Linux multivac.cwru.edu 2.4.23 #1 SMP Mon Dec 1 17:11:18 EST 2003
i686 unknown unknown GNU/Linux
Machine Type: i686-pc-linux-gnu
Bash Version: 2.05b
Patch Level: 0
Release Status: release
Description:
I would expect that $((1<<n == 2**n)) for all n, but apparently this
is not true for n>=64. Bug?
Repeat-By:
$ echo $((1<<63)); echo $((2**63))
-9223372036854775808
-9223372036854775808
$ echo $((1<<64)); echo $((2**64))
1
0
$ echo $((1<<65)); echo $((2**65))
2
0
$ echo $((1<<66)); echo $((2**66))
4
0
paul
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- $((1<<64)) = 1,
Paul Jarc <=