Is it possible to validate that an input is of type email?

 Usually for validating email we use Regex code , it is going to check the format of the entered email text . Not sure what you are looking for , can you give more details of your usecase?

and how do u use a regex code in an input?

lumi29  Replace the value in the "^[a-z0-9]+(\.[a-z0-9]+)*@[a-z0-9]+(\.[a-z0-9]+)*(\.[a-z]{2,5})$" with a constant.

if(
  a!isNullOrEmpty(ri!input),
  null,
  if(
    regexmatch(
      "^[a-z0-9]+(\.[a-z0-9]+)*@[a-z0-9]+(\.[a-z0-9]+)*(\.[a-z]{2,5})$",
      ri!input
    ),
    "",
    "Please enter a valid email address"
  )
)

if(
                  regexmatch(
                    pattern: "\b[\w\.-]+@[\w\.-]+\.\w{2,4}\b",
                    searchString:ri!your_Variable,
                    regexFlags: "si"
                  ),
                  "",
                  "Please Enter Valid Email"
                )

On validations , regex code gonna check whether entered email is in right format or not. Search online for better Regex codes which suites you.

The function 'regexmatch' is unavailable. :(

https://community.appian.com/b/appmarket/posts/regular-expression-functions , Use this plugin

Do you have access to admin console in your environment? If yes, then navigate to Plug-ins and add new plugin "Appian Regular Expression Functions"

Do you have access to admin console in your environment? If yes, then navigate to Plug-ins and add new plugin "Appian Regular Expression Functions"