EN
Bash - check if string is empty
0 points
This article will show you how to check if the string is empty in Bash.
Quick solution:
xxxxxxxxxx1
2
3
variable="Sample text"4
[ -z "$variable" ] && echo "variable is empty" || echo "variable is not empty"Example output:
xxxxxxxxxx1
variable is not empty
xxxxxxxxxx1
2
3
variable="Sample text"4
empty_variable=""5
6
[ -z "$variable" ] && echo "variable is empty" || echo "variable is not empty"7
[ -z "$empty_variable" ] && echo "empty_variable is empty" || echo "empty_variable is not empty"Example output:
xxxxxxxxxx1
variable is not empty2
empty_variable is emptyxxxxxxxxxx1
2
3
variable="Sample text"4
5
if [ -z "$variable" ] 6
then 7
echo "variable is empty"8
else 9
echo "variable is not empty"10
fiOutput:
xxxxxxxxxx1
variable is not emptyxxxxxxxxxx1
2
3
variable="Sample text"4
5
if test -z "$variable"6
then 7
echo "variable is empty"8
else 9
echo "variable is not empty"10
fiOutput:
xxxxxxxxxx1
variable is not empty