isLetter
A Boolean value indicating whether this character is a letter.
Declaration
var isLetter: Bool { get }Discussion
For example, the following characters are all letters:
“A” (U+0041 LATIN CAPITAL LETTER A)
“é” (U+0065 LATIN SMALL LETTER E, U+0301 COMBINING ACUTE ACCENT)
“ϴ” (U+03F4 GREEK CAPITAL THETA SYMBOL)
“ڈ” (U+0688 ARABIC LETTER DDAL)
“日” (U+65E5 CJK UNIFIED IDEOGRAPH-65E5)
“ᚨ” (U+16A8 RUNIC LETTER ANSUZ A)