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This is not a variable that you could test, but a constant function
– jarno
Commented Oct 28, 2019 at 13:11
@jarno Is testing the return value of a function different from testing a variable, for the purposes of a script?
– johnraff
Commented Nov 5, 2019 at 0:23
Well, the question is about variables.
– jarno
Commented Nov 5, 2019 at 10:28
True, although the usage in a shell script would be the same.
– johnraff
Commented Nov 7, 2019 at 6:03

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