I need a regex, that solves the follwing task: - input - a single char from a to j and a single number after the char from 1 to 10 (inclusive)
Correct: a1, a2, f3, b7, c10
Wrong: a11, b0, abv, a34, h11, 1c
I've tried these: ^[a-j]{1}[0-9|10]{1,2}$ ^[a-j]{1}[0-9]{2}$
Thanks in advance!
This should do it.
"^[a-j]([1-9]|10)$"
The first bracket matches the single letter, then there is an alternative which is either a single digit or the number 10.
^[a-j]{1}[0-9|10]{1,2}$
A {1} is redundant. [0-9|10] means: any of the characters 0, 1,... 9 or |, because [] acts like a set expression, with - for ranges. Also, you would permit this single character to be written once or twice, which would match a11, a12,...j99 etc.
^[a-j]{1}[0-9]{2}$
Better, but permitting any two digits after the letter.
[..] is character class where you can specify single characters like [abc] will mean a or b or c. If you write it like [10] it will mean 1 or 0, not 10.
So instead of [0-9|10] which means 0 or 1 or .. or 9 or | or 1 or 0 you need to write something closer to [0-9]|10 (notice position of ]).
Also {1} is redundant.
Rest of your regex seems fine.
