im trying to do a Number Check not including decimals as well as within range check but it is not working
example of accepted numbers: 1, 10, 100
not accepted numbers: 1.1, 10.1, 100.1
echo "Qty Sold: "
read sold
if [[ "$sold" =~ `^([0-9])$` && "$sold" -gt 0 && "$sold" -lt 999 ]] ;
then
echo "ok"
else
echo "Error, Qty Sold Must be Positive Integer";
fi
Remove the backticks which exists around your regex and use + after [0-9] to match one or more digits.
if [[ "$sold" =~ ^[0-9]+$ && "$sold" -gt 0 && "$sold" -lt 999 ]] ;
Example:
$ sold=12
$ if [[ "$sold" =~ ^[0-9]+$ && "$sold" -gt 0 && "$sold" -lt 999 ]] ; then echo 'Ok'; else echo 'NOT ok'; fi
Ok
$ sold=0
$ if [[ "$sold" =~ ^[0-9]+$ && "$sold" -gt 0 && "$sold" -lt 999 ]] ; then echo 'Ok'; else echo 'NOT ok'; fi
NOT ok
$ sold=1000
$ if [[ "$sold" =~ ^[0-9]+$ && "$sold" -gt 0 && "$sold" -lt 999 ]] ; then echo 'Ok'; else echo 'NOT ok'; fi
NOT ok
Without using regex:
((sold>0 && sold <999)) 2>/dev/null && echo "ok" || echo "Error, Qty Sold Must be Positive Integer"
The [[ syntax is a bit different from [ syntax. You do not need any delimiter around the regex in =~. So no / or backtick or apostrophe or ampersand is needed (only if regex contains a space. It can be escaped by backslash or add apostrophe or ampersand around the space or use [[:space:]] instead (which also includes TAB and some other whitespace characters)). What is more the ampersand also not needed around $sold (only in [[!). So the conditional part may be like this
if [[ $sold =~ ^[[:digit:]]{1,3}$ && $sold -gt 0 && $sold -lt 999 ]]; then echo ok
else echo "Error, Qty Sold Must be Positive Integer between 1 and 998";
fi
This checks if one, two or three digits are entered and it is not zero.
