How to remove carriage return and newline from a variable in shell script

Question

I am new to shell script. I am sourcing a file, which is created in Windows and has carriage returns, using the source command. After I source when I append som

Answer 1

for a pure shell solution without calling external program:

NL=$'\n'    # define a variable to reference 'newline'

testVar=${testVar%$NL}    # removes trailing 'NL' from string