Basus operates with two different kinds of numbers: Integers and reals (floating point). Integers do not contain any fractional part, while reals do.
Integers are (32 bit) numbers between -2147483648 and 2147483647. Any constant written without a decimal point (".") will be treated as an integer. The following assignment would make x an integer:
x = 3;
Reals are (IEEE 754 64 bit) double precision numbers. Any constant written with a decimal part is treated as a real. The following assignment would make x a real number:
x = 3.0;
Real numbers may optionally be given an exponent using the "e" character. Writing 2.1e5 would mean 2.1*10^5. The exponent may be negative.
The smallest possible positive real that is not zero, is 4.9e-324. The largest possible real is 1.7976931348623157e308.
Note that every single part of an expression operating on one or two integers will result in an integer. If you write 1/3, the answer would be 0, since the calculation is performed on integers. If you want to make the calculation floating point, make sure at least one of the numbers is a floating point, e.g: 1.0/3.