A number in Malaga consists of an integer part, an optional fractional part and an optional exponent of the form `E[+|-]n'. There must be a dot between the integer part and the fractional part. Examples: `0', `1', `1.0', `13.75', `1.2E-5'.
Alternatively, a number may consist of an integer number followed by
`L', indicating that the number is intended as a list index
counting from the left border), or by `R', indicating that
the number is intended as a list index counting from the right
border. Examples: 5L
= 5
, 12R
= -12
.