EXPR(1) >>>> EXPR(1)
>>
expr - >>>>>>
>>
expr >>>
expr >>
>>
--help >>>>>>>>>>
--version
>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>1 | >>2
>>>>1 >>> null >>>
0>>>>>1>>>>>>2
>>1 & >>2
>>>>>>>>> null >>>
0>>>>>1>>>> 0
>>1 < >>2
>>1 >>>>2
>>1 <= >>2
>>1 >>>>>>>2
>>1 = >>2
>>1 >>>>2
>>1 != >>2
>>1 >>>>>2
>>1 >= >>2
>>1 >>>>>>>2
>>1 > >>2
>>1 >>>>2
>>1 + >>2
>>1 >>>2 >>>>
>>1 - >>2
>>1 >>>2 >>>>
>>1 * >>2
>>1 >>>2 >>>>>
>>1 / >>2
>>1 >>>>2 >>>>
>>1 % >>2
>>1 >>>>2 >>>>
>>> : >>>>>
>>>>>>>>>>>>>>>>>>>>>>
match >>> >>>>>
>">>> : >>>>>">>
substr >>> >> >>
>>>>>>>>>> 1 >>>>
index >>> CHARS
>>>>>>>>>>>> CHARS >>>>>> 0
length >>>
>>> >>>
+ TOKEN
> TOKEN >>>>>>>>>>>>
>>> 'match' >>>>>>>>>> '/'
>>>>
( >>> )
>>> >>
>>>>>>>>>>> shell
>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
\( > \) >>>>>>>> null>>> \( > \)
>>>>>>>>>>>>>>>>>> 0>
>> >>> >>> null >>> 0>>>>>>>>
0>>> >>> > null > 0>>>>>>>> 1>>>
>>> >>>>>>>>>>>>>>
1>>>>>>>>>>>>>>> 3>
>>
> Mike Parker, James Youngman > Paul Eggert >>>
>>>>
GNU coreutils >>>>>>
>>
>>>>>>>
>>
Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later .
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
>>
>>>>>>>
>>>>>>>> info '(coreutils) expr invocation'
>
>>>>>>>>> man >>>>>>>>
>> man >>>>>>https://github.com/man-pages-zh/manpages-
zh
GNU coreutils 9.1 2022>9> EXPR(1)