Parameters & Returns
Parameters
Returns
Quick Summary
Tests if all characters in a string are alphabetic.
Takes str (string to test).
Returns 1 if every character in the string is alphabetic (A-Z, a-z), otherwise returns 0.
Technical Exegesis...
Returns 1 if every character in the string is alphabetic (A-Z, a-z), otherwise returns 0. Returns 0 if the string is empty or null.
All characters must be letters for this to return 1. Digits, spaces, and punctuation will cause it to return 0. Useful for validating text-only input.