6-Booleans

Notebook

Link to the Google Colaboratory notebook: 6-Booleans

A boolean is either True or False.

Comparison

When you compare two values, it returns a boolean:

x,y = -1, 10
print(x == y)
print(x > y)
print(x < y)
print(x != y)

False
False
True
True

It is used a the basic for conditions.

x,y = -1, 10
if x<y:
    print("x less than y")
else: 
    print("x greater than y")

x less than y

Evaluate values

The bool variable allows you to evaluate any variable.

Most of the times, the output will be True.

x = 77
name = "Evry"
list_test = [0, 10, 4]
print(bool(x), bool(name), bool(list_test))

True True True

Note

• Any str is True, except if it is empty.
• Any number is True, except from 0.
• Any list is True, except an empty list.

x = 0
name = ""
list_test = []
print(bool(x), bool(name), bool(list_test))

False False False