Mathematics with Python and Ruby/Whole numbers in Python

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Whole numbers are not the only numbers, as we will see in the following chapters. So what does Python do to know if a number is whole? As the language is weakly typed, it must guess. The criterium is simple: in order for a number to be whole, it must not have a decimal point.

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Whole numbers in Python[edit | edit source]

Thus, if one enters

a = 3
b = 3.14
c = int(b)

one notes that Python knows that a is whole, that b is not, and that c can be whole although it was obtained from b (which is real).

Certain calculations that should give a whole result do not always do so in Python. For example, while , Python treats this number as a real number (not a whole number)!

from math import sqrt
a = sqrt(100)

Operations[edit | edit source]

Addition, subtraction and multiplication[edit | edit source]

The first three operations are denoted by the symbols +, - and * as in most programming languages. The sum, difference and product of two (or more) whole numbers are all integers.