isReal

isReal(): Boolean;

The isReal method of the String primitive type returns true if the receiver represents a valid real value; otherwise, it returns false.

The following example shows the use of the isReal method.

vars
    stringValue : String;
begin
    stringValue := '+123.456';
    write stringValue.isReal;   // Outputs true
    stringValue := '+123,456';
    write stringValue.isReal;   // Outputs false
end;