Changing last character in string variable

[Tamara May]

I have a string variable, which varies in length from 3 to 4 characters.
For each case that the last character of this variable variable is 0, I would like to change so that it ends in 9.
Any help with this would be fantastic, thank you.

[Andrew Musau]

Here are two ways to do this:

replace strvar =substr(strvar, 1, length(strvar)-1) + "9"

replace strvar = regexr(strvar, "[0-9]$", "9")

where you replace "strvar" with the name of your string variable.

[Tamara May]

Thanks Andrew.
Do you know how I could change the last character to 9 only when it ends in 0? (not change every last character to 9?)

[Andrew Musau]

replace strvar = regexr(strvar, "[0]$", "9")

[Tamara May]

Yes! Thanks very much Andrew