isalpha()

Read(330) Label: letter, boolean value,

Description:

Check if a string is composed of letters.

Syntax:

isalpha(s)

Note:

The function checks if string s is composed of letters. If s is an integer, look it up in the ASCII table to see if the corresponding characters are letters.

Parameters:

s

String/ numeric expression

Return value:

Boolean value

Example:

isalpha("abc")

true

isalpha(97)

true

isalpha("@#$")

false

isalpha("1@23")

false

isalpha("a@23")

false

Related functions:

isdigit()