Artcafe Easy Programming Learning - Python programming part 4

Operators in Python Programming language 2

We studies what are the Arithmetic operators, Comparisons Operators that used in the Python Programming in last blog session Artcafe. Today we are going to learn what the Logical Operators in Python are.

Logical Operators

If you have knowledge of Logic gates, you can easily understand this Logical Operators. Logical Operators are an important type of Operators. There are 3 main logical operators.

1. AND
2. OR
3. NOT

These logical operators are working like as the Logic gates. So let’s understand about these operators.

AND Operator

I will start with an example for this operator, When you log into Gmail, Facebook, Twitter.. etc, you have to input your user name and password. If the username and password are both correct only, you can login to that accounts. If one input is incorrect, you can’t login there successfully. This AND Operator also same as that situation. Both conditions should be true to get the output as true. Please refer below table to get understand.

Username	Password	Login
Incorrect	Incorrect	False
Incorrect	Correct	False
Correct	Incorrect	False
Correct	Correct	True

By connecting the two conditions using the AND, the both conditions should be true for get output as “TRUE”

I hope, now you have a basic idea about AND Operator, Let’s see how to do that in Python Programming Mathematical statements.

First Statement	First Statement result	Second Statement	First Statement result	Using AND Operator	AND Operator result
(2>3)	false	(5>7)	False	(2>3) and (5>7)	False
(2>3)	False	(7>5)	True	(2>3) and (7>5)	False
(3>2)	True	(5>7)	False	(3>2) and (5>7)	False
(3>2)	True	(7>5)	True	(3>2) and (3>2)	True

Let’s create a simple python program to test this AND Operator. Open the Python shell and Code the following codes using Script mode. Then run the script.  If you don’t know how to run a python script using Script mode, please visit here.

When you run that program it will give outputs like below. So I hope you got a basic idea about AND Operators in Python.

OR Operator

We take an example to understand this OR operator. We are stay on a room that have two doors. If that both two doors are open, we can go out by those two doors. If one door is open, we can go out by one door. But both doors are closed, we can’t go out. That process is happening in the OR Operator. Please refer below table to get understand. 

First door	Second door	Go out
Closed	Closed	False
Closed	Open	True
Open	Closed	True
Open	Open	True

By connecting the two conditions using the OR, at least one statement should be TRUE for get output as “TRUE”

I hope, now you have a basic idea about OR Operator, Let’s see how to do that in Python Programming Mathematical statements.

First Statement	First Statement result	Second Statement	First Statement result	Using OR Operator	OR Operator result
(2>3)	false	(5>7)	False	(2>3) or (5>7)	False
(2>3)	False	(7>5)	True	(2>3) or (7>5)	True
(3>2)	True	(5>7)	False	(3>2) or (5>7)	True
(3>2)	True	(7>5)	True	(3>2) or (3>2)	True

Let’s create a simple python program to test this OR Operator. Open the Python shell and Code the following codes using Script mode. Then run the script.  If you don’t know how to run a python script using Script mode, please visit here.

When you run that program it will give outputs like below. So I hope you got a basic idea about OR Operators in Python.

NOT Operator

The Not operator always provide the opposite value. If we input 1 the Not Operator provide 0 as the output. If we input 0, the Not operator provide 1 as the output. This is easy to understand. Please refer following tables.

Statement	not(Statement)
True(1)	False(0)
False(0)	True(1)

Statement	not(Statement)
(6>5) = True	not(6>5) = False
(5>6) = False	not(5>6) = True

Let’s create a simple python program to test this OR Operator. Open the Python shell and Code the following codes using Script mode. Then run the script. 

When you run that program it will give outputs like below. So I hope you got a basic idea about OR Operators in Python.

I hope you learn a lot about the AND, OR and NOT Operators in Python Programming. If you have any problem or error about the lesson or executing commands please write them on a comment box. I will help you to resolve that problems. As well as if you have any suggestions or complain please feel free to comment.  Thank you. See you in next python lesson.