windows - How do you get the string length in a batch file? -

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there doesn't appear easy way length of string in batch file. e.g.,

set my_string=abcdefg set /a my_string_len=???

how find string length of my_string?

bonus points if string length function handles possible characters in strings including escape characters, this: !%^^()^!.

as there no built in function string length, can write own function so: 

@echo off setlocal set "mystring=abcdef!%%^^()^!" call :strlen result mystring echo %result% goto :eof  :strlen <resultvar> <stringvar> (        setlocal enabledelayedexpansion     set "s=!%~2!#"     set "len=0"     %%p in (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) (         if "!s:~%%p,1!" neq "" (              set /a "len+=%%p"             set "s=!s:~%%p!"         )     ) ) (      endlocal     set "%~1=%len%"     exit /b )

this function needs 13 loops, instead of simple strlen function needs strlen-loops.
handles characters.


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