size = 1

print(size < 0)

size = 0
print(size < 0)

size = -1
print(size < 0)

print(True + True)
print(True - False)
print(True * False)
print(True / False)

"""
False
False
True
2
1
0
Traceback (most recent call last):
  File "/Users/moqi/Documents/Code/dive-into-python3-practice/c03/p063_test_bool.py", line 14, in <module>
    print(True / False)
ZeroDivisionError: division by zero
"""
