bash: Test if a string has nonzero length.

indigowinged

Take into account the main readme for this section. README first.

Using the -n test option.

echo -n "Type in your string here:"
read MyVar

if [[ -n "$MyVar" ]];then
   echo "MyVar is not an empty string."
else
   echo "MyVar is an empty string."
fi

Enter a string of characters.

$ ./test.sh
Type in your string, here:hello
MyVar is not an empty string.

Enter a blank string.

$ ./test.sh
Type in your string, here:
MyVar is an empty string.