Edna's Python Archives

Warm-up: one random term.

• float

  Data types

  What this creature is

  A float is a number with a decimal point. Use it for measurements, ratios, and any value that is not a whole number.

  Why you will regret ignoring it

  Many real-world values (money, science, graphics) need decimals. Floats are the usual way to represent them in Python.

  Example

  pi_approx = 3.14
  half = 0.5

  Common disgrace

  Comparing two floats with == when they came from math operations — tiny rounding differences can make them not exactly equal.

  Trial by code

  Store two floats, multiply them, and print the result rounded to two decimal places.