-n STRING (conditional operator)

true if the string is not empty, i.e. if its length is non-zero. This is usually only useful for strings, which contain variables or sub-expressions.

-z tests if a string is empty.

Examples

Different ways to test if a string is not empty:
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2
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4
test -n "$name" && echo "not empty"
[ -n "$name" ] && echo "not empty"
# Bash
[[ -n "$name" ]] && echo "not empty"
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