The alpha() function evaluates the expression and returns 1 (true) if every character in the string is alphabetical (that is, a—z upper and lowercase), or 0 (false) if any character is nonalphabetical.
The empty (null) string ("") is considered nonalphabetical.
Syntax
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alpha(exp) |
Parameter(s)
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exp |
String to be tested for the existence of alphabetical characters. |
Example(s)
If the value of the variable, response, is made up of only alpha characters, it is assigned to the first element of array.
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if alpha(response) then array(1) = response |
See Also