stringkotlincharstring-matchingtextmatching

Check if a string contains only letters

How can I make a function that takes a string and returns the result whether the string contains only alphabet letters or not?

Solution

  • function all returns true if all characters match the given predicate.

    fun String.onlyLetters() = all { it.isLetter() }

if (str.onlyLetters()) {
// only letters
}
else {

}