ISNUMBER Function

Syntax

Result_Flag as L = isnumber(C string [,L allow_decimal_separator [,L allow_thousands_separator ]])

Arguments

string: A character string.
allow_decimal_separator: Logical. Optional. Default = .F. .T. = allow decimal separators, .F. = do not allow decimal separators
allow_thousands_separator: Logical. Optional. Default = .F. .T. = allow thousands separators, .F. = do not allow thousands separators

Description

Returns .t. if a text string contains only numbers

Discussion

ISNUMBER() returns .T. (TRUE) if a Character_String contains only numbers; otherwise, it returns .F. (FALSE).

Example

isnumber("123")
= .T.
isnumber("123a")
= .F.
? isnumber("123,345.23")
= .F.
? isnumber("123,345.23", .t.)
= .F.
? isnumber("123,345.23", .t., .t.)
= .T.