The Or Keyword In Python

Overview:

  • The, or keyword implements the logical OR operation in Python.
  • In Mathematics the OR operator returns True, if at least one of the operands evaluate to True.
  • In Electronics the OR Gate implements the logical OR and the input and output are described by the truth table given below.
  • Remember in Python or operator does not return True or False. The, or operator in Python returns the first operand if it is True else the second operand.

 

Truth table of the or Operator:

 

Operand 1

Operand 2

Result

True

True

True

False

True

True

True

False

True

False

False

False

 

Ven Diagram of the or operator:

Ven diagram of the logical operator - or

 

Example 1:

# Example python program using or operator

 

def addToBasket():

    print("Item added successfully")

 

def doNotAddToBasket():

    print("Can not add the item")

 

fish1        = None

fish2        = "Tuna"

validItem    = fish1 or fish2

 

if validItem:

    print(validItem)

    addToBasket()

else:

    donotAddToBasket()

 

 

Output 1:

Tuna

Item added successfully

 

 

Example 2:

# Example python program using or operator

def buy():

    print("Buy order placed")

 

def sell():

    print("Sell order placed")

 

indicator1 = 10

indicator2 = 1.5

 

if indicator1 >= 10 or indicator2 < 1:

    buy()

 

else:

    sell()   

 

 

Output 2:

Buy order placed

 

 


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