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nacho_a
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9 months ago
in Checking if a variable is a number in ksh | Korn shell | Tech-Recipes on Tech-Recipes
What if $1 is 0?
You'll get FALSE!
From expr's man page:
EXIT STATUS
[...]
0 if the expression is neither NULL nor 0
1 if the expression is either NULL or 0
[...]
I'd use "-eq 2" instead of "-ne 0."
Thanks anyway, good tip.
You'll get FALSE!
From expr's man page:
EXIT STATUS
[...]
0 if the expression is neither NULL nor 0
1 if the expression is either NULL or 0
[...]
I'd use "-eq 2" instead of "-ne 0."
Thanks anyway, good tip.
1 reply
Mr. KIPS
I wouldn't play with the exit status. Instead, change the arithmetic expression. Use expr $1 +1.
