7. Numeric variables¶

Integers do not have decimal places: 42, -7
Values of type integer in Python are called int
Floating point numbers have decimal places: 1.0, 3.1415, 1234.56
Note that 1.0, even though it has a zero in the decimal part, is a floating point number
Values of type floating point in Python are called float.

7.1. Representation of numeric values¶

Internally, all numbers are represented with the binary system
This system only allows the digits 0 or 1
Floating point numbers may not have a proper representation in the binary system
Typing in the interpreter 3 * 0.1 will give us a response of: 0.30000000000000004

Try it here!