There are three different kinds of built-in numbers in Python : ints, floats, and complex. However, in this exercise you'll be dealing only with ints and floats.
ints are whole numbers. e.g. 1234, -10, 20201278.
Integers in Python have arbitrary precision -- the number of digits is limited only by the available memory of the host system.
floats are numbers containing a decimal point. e.g. 0.0,3.14,-9.01.
Floating point numbers are usually implemented in Python using a double in C (15 decimal places of precision), but will vary in representation based on the host system and other implementation details. This can create some surprises when working with floats, but is "good enough" for most situations.
You can see more details and discussions in the following resources:
- Python numeric type documentation
- The Python Tutorial
- Documentation for
int()built in - Documentation for
float()built in - 0.30000000000000004.com
Python fully supports arithmetic between ints and floats. It will convert narrower numbers to match their less narrow counterparts when used with the binary arithmetic operators (+, -, *, /, //, and %). When division with /, // returns the quotient and % returns the remainder.
Python considers ints narrower than floats. So, using a float in an expression ensures the result will be a float too. However, when doing division, the result will always be a float, even if only integers are used.
# The int is widened to a float here, and a float type is returned.
>>> 3 + 4.0
7.0
>>> 3 * 4.0
12.0
>>> 3 - 2.0
1.0
# Division always returns a float.
>>> 6 / 2
3.0
>>> 7 / 4
1.75
# Calculating remainders.
>>> 7 % 4
3
>>> 2 % 4
2
>>> 12.75 % 3
0.75If an int result is needed, you can use // to truncate the result.
>>> 6 // 2
3
>>> 7 // 4
1To convert a float to an integer, you can use int(). Also, to convert an integer to a float, you can use float().
>>> int(6 / 2)
3
>>> float(1 + 2)
3.0