"""Solution 20.23.4 — Verifying a percentage

Chapter 20: Common Pitfalls — Everyday Programming

Bug type: Logical

0.7 + 0.1 is not exactly 0.8 in binary floating-point, so the strict
equality fails. Use math.isclose to allow for rounding error.

Exercise: ex_20_23_4.py
"""

import math

part_one = 0.7
part_two = 0.1
if math.isclose(part_one + part_two, 0.8):
    print("Percentages add correctly")
else:
    print("Percentages do not add correctly")