Determines whether the leftmost character of the specified character expression is a digit (0 through 9).
Syntax
ISDIGIT(cExpression)
Returns
Logical
Arguments
cExpression
Specifies the character expression that ISDIGIT( ) tests. Any characters after the first character in cExpression are ignored.
Remarks
ISDIGIT( ) returns true (.T.) if the leftmost character of the specified character expression is a digit (0 through 9); otherwise, ISDIGIT( ) returns false (.F.).