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

yet another solution uses tr:

echo $testVar | tr -d '\r'
cat myscript | tr -d '\r'

the option -d stands for delete.