If you do $((08+1)) or $((09+1)) in terminal, linux shows an error.
However, you can use 07,06,05,04,03,02,01,00, and Linux treat them as 7,6,5,4,3,2,1,0.
Can someone tell me how to make 08 and 09 work in this way?
6 4343
If you do $((08+1)) or $((09+1)) in terminal, linux shows an error.
However, you can use 07,06,05,04,03,02,01,00, and Linux treat them as 7,6,5,4,3,2,1,0.
Can someone tell me how to make 08 and 09 work in this way?
That's easy!
Prefacing a number with a 0 when it isn't the only digit before a decimal (.) will cause most programming languages to treat is as Octal (base 8). The highest numeric digit in octal is 7, thus 8 and 9 will not show up.
If you don't believe me, try 077 and see what you get.
can someone tell me how to make 08 and 09 work as 8, 9?
can someone tell me how to make 08 and 09 work as 8, 9?
As far as I know, this cannot be done in the way you've posed the question. This is similar to asking for 0x11 be represented as 11 (which is certainly not the case).
if you need them to be viewed as 08 and 09 you can do your calculations with the decimal equivalents 0 - 9 and use printf to display them with the leading 0 (zero)
This behavior seems to vary depending on the shell: -
~> echo $SHELL
-
/usr/local/bin/bash
-
~> echo $((09+7))
-
-bash: 09: value too great for base (error token is "09")
-
~> ksh
-
$ echo $((09+7))
-
16
-
$
-
There's also the typeset built-in which can be used for formatting: -
$
-
$ typeset -Z2 num1=9
-
$ typeset -Z3 num2
-
$ num2=8
-
$ echo $num1
-
09
-
$ echo $num2
-
008
-
$ echo $((num1 * num2))
-
72
-
$
-
This worked for me in the bash shell. If I tried to default the dirNUM to 3 digits first then I would error out with the 08 errors. -
dirNUM=1
-
until [[ $dirNUM == 367 ]]
-
do
-
# Change directory number to 3 digits
-
if [[ ! -d ${root_dir}/$(printf "%.3d" $dirNUM) ]]
-
then
-
mkdir ${root_dir}/$(printf "%.3d" $dirNUM)
-
fi
-
((dirNUM+=1))
-
done
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