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SC2084
Joachim Ansorg edited this page Nov 12, 2021
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i=4
$(( i++ ))Bash, Ksh:
i=4
(( i++ ))POSIX (assuming ++ is supported):
i=4
_=$(( i++ ))Alternative POSIX version that does not preserve the exit code:
: $(( i++ ))$((..)) expands to a number. If it's the only word on the line, the shell will try to execute this number as a command name:
$ i=4
$ $(( i++ ))
4: command not found
$ echo $i
5To avoid trying to execute the number as a command name, use one of the methods mentioned:
$ i=4
$ _=$(( i++ ))
$ echo $i
5None.
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