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Learn batch script

Jan. 21, 2022, 8:36 p.m. by lufy

strings

get substring

SET s=abcdefghijklmnopqrst

ECHO %s:~3,1%

REM # %<var_name>:~<start_index>,<length>%

REM # what if with variable index and length?

REM # copied from https://ss64.com/nt/syntax-substring.html 

SET _startchar=2
SET _length=1
SET _donor=884777
CALL SET _substring=%%_donor:~%_startchar%,%_length%%%
ECHO (%_substring%) 

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