SAIL expression for finding any of a set of characters within a string variable

Basically for something like this, you can just loop over the set of characters of interest and use a function like "search" to search the original user input string for the current item - that would produce a list of booleans, which you can wrap in an or() statement to return true when any are true.

a!localVariables(

  local!userInput: "Sample user in+put",
  local!charactersOfInterest: {"+", "$", "£", "€", "%"},
  
  local!isFoundCharacterOfInterest: or(
    a!forEach(
      local!charactersOfInterest,
      search(fv!item, local!userInput) > 0
    )
  ),
  
  local!isFoundCharacterOfInterest
)

Basically for something like this, you can just loop over the set of characters of interest and use a function like "search" to search the original user input string for the current item - that would produce a list of booleans, which you can wrap in an or() statement to return true when any are true.

a!localVariables(

  local!userInput: "Sample user in+put",
  local!charactersOfInterest: {"+", "$", "£", "€", "%"},
  
  local!isFoundCharacterOfInterest: or(
    a!forEach(
      local!charactersOfInterest,
      search(fv!item, local!userInput) > 0
    )
  ),
  
  local!isFoundCharacterOfInterest
)

a!localVariables(

  local!userInput: "Sample user input",
  local!charactersOfInterest: {"+", "$", "£", "€", "%"},
  
  any(find(_, local!userInput), local!charactersOfInterest)
)

Yeah there's a top of options here (and both the ones above are good). Just to add one more possibility - my preference is to use the cleanwith() function because it doesn't require looping:

not(
  isnull(
    cleanwith(
      "tehsajksdhfalskdjfha $ 23ui34kjasdnf ",
      "+$£€%"
    )
  )
)

These days I avoid the old looping functions requiring partial evaluation to the greatest extent possible.  If not least because of code clarity and readability to later developers.

Thanks so much Mike.

It worked like a charm!