[Solved] Shell Error: syntax error: invalid arithmetic operator (error token is “

When processing windows format text, use \r\n as the newline character, if the data involved in the operation is at the end of the line

syntax error: invalid arithmetic operator (error token is “

awk -v RS= ' \r\n ' ...

awk  ' { sub("\r$", ""); ...}

awk  ' {sub(/\r/,"",$NF); ...} '

awk  ' BEGIN { RS=ORS="\r\n"; ...

foo=$ ' 5\r ' ; echo $(( 5 + foo))

" )syntax error: invalid arithmetic operator (error token is "

foo=$ ' 5\r ' ; echo $(( 5 +${foo // $'\r'}))

foo=$ ' 5\r ' ; echo $(( 5 +$( tr -d ' \r ' <<< " $foo " )))

or remove \r

foo=$ ' 5\r ' ; foo=${foo // $'\r'}

DebugAH