Python Booleans
Python Booleans are a type of data that can have one of two possible values: True or False. Booleans are used in logical expressions to determine whether a statement is true or false.
Example
print (10 > 5) #outputs: True print (10 > 15) #outputs: False print (10 == 10) #outputs: True
Boolean Logic
The Boolean operators and, or & not allows us to check for multiple conditions. For Example:
x = 7
y = 8
print (x > 0 and y == x) #outputs: False
print (x > 0 or y == x) #outputs: True
print (not x > 1) #outputs: False- and Operator:- and operator returns True if both the conditions are true. In an above example, x was greater then 0 but y is not equal to x. So, we get the output False.
- or Operator:- or operator returns True if any one or both of the condition(s) are True. In an above example, x was greater then 0 but y is not equal to x. So, we get the output True.
- not Operator:- not operator returns True if the condition is false and returns False if the condition is True. In an above example, x was greater then 1. So, we get the output False.
Python – Evaluate Values and Variables
Python also has a built-in bool() function that can be used to evaluate any value to a Boolean. For example:
print(bool("Hello")) #True
print(bool(15)) #True
print (bool("")) #False
print (bool(" ")) #True
print (bool(["apple", "cherry", "banana"]) #True
By seeing the above example you may have noticed that almost all values are True. But their are some values that evaluate to False. For example empty values like (), {}, [], "" and the number 0.
Here are the values that will evaluate to False.
print(bool(0))
print(bool(None))
print(bool(""))
print(bool(()))
print(bool({}))
print(bool([]))
print (bool(False))Remember that "" and " " are not same.
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Python Booleans
