isLetter {qmrparser}

Is it a letter?

Description

Checks whether a character is a letter

Restricted to ASCII character (does not process ñ, ç, accented vowels...)

Usage

isLetter(ch)

Arguments

ch

character to be checked

Value

TRUE/FALSE, depending on the character being a letter.

Examples

isLetter('A')
isLetter('a')
isLetter('9')