-z STRING (conditional operator)
true if the string is empty, i.e. if its length is zero.
This is usually only useful for strings, which contain variables or sub-expressions.
-n tests if a string is not empty.
- Different ways to test if a string is empty:
1 2 3 4
test -z "$name" && echo "empty" [ -z "$name" ] && echo "empty" # Bash [[ -z "$name" ]] && echo "empty"
BashSupport Pro is a Bash IDE with support for -z – try it now!