$$ Number ::= [-] Digit {Digit} ["." Digit {Digit}] "E" Digit {Digit} .
A number in Malaga consists of an optional ``-'' sign, an integer part, an
optional fractional part and an optional exponent of the form `` E+
-
''. There must be a dot between the integer part and the
fractional part. Examples: ``0'', ``1'', ``1.0'', `` -13.75'', ``1.2E-5''.