Extract values delimited by characters without characters with regex (LabView)

Question

I want to extract the number sandwiched between two specific letters.

e.g. string: x23y4z90

I specify x and y , I get 23
I specify y and z , I get 4
I specify z and x , I get 90 (the string pattern loops)

x\dy yields x23y, but I don't want the letters included.

*note: This is to read sensor values serially in LabVIEW.

Answer 1

One possibility is to use groups:

x(\d+)y

Now, the second group will contain only the number. The first group will be the whole match.

Another possibility is to use positive lookahead and positive lookbehind:

(?<=x)\d+(?=y)

Please note the + I added. This is necessary to match numbers with multiple digits.

Check it here for x and y and here for y and z.