SYNOPSIS:
    double: [+-][0-9]*(.[0-9]*)?[eE[+-][0-9]*]

DESCRIPTION:
    Many parameters for eccet commands take floating point numbers
    as arguments.
    Whereever you can specify such numbers, eccet will parse
    the usual scientific notation like 1.34 735.23e-5, etc.

EXAMPLES:
    3.1415926 1e3

SEE ALSO:
    integer, void, string, expression
