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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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13
Task/Empty-string/UNIX-Shell/empty-string.sh Normal file
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# assign an empty string to a variable
s=""
# the "test" command can determine truth by examining the string itself
if [ "$s" ]; then echo "not empty"; else echo "empty"; fi
# compare the string to the empty string
if [ "$s" = "" ]; then echo "s is the empty string"; fi
if [ "$s" != "" ]; then echo "s is not empty"; fi
# examine the length of the string
if [ -z "$s" ]; then echo "the string has length zero: it is empty"; fi
if [ -n "$s" ]; then echo "the string has length non-zero: it is not empty"; fi