Usage
{{str index|text|number}} = Returns the number-th character of text. Base 1: the first character is numbered 1, and so on.
Only supports a limited character set. Returns an error on unknown characters. Returns   for a blank space.
- The character set is A-Z, a-z, 0-9, space and !@#$%^&*().,<>:;[]'"?/\{}~`=-|+_♣♦♥♠. (Obviously | and = will have to have been input as {{!}} and {{=}}.)
Examples
{{str index|0123456789ABCDEF|15}}→ Template:Str ≥ len{{str index|0123456789ABCDEF|18}}→ Template:Str ≥ len{{str len|{{str index|a b|2}}}}}}→ 23 (because the return is rather than a space character.)