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Logical Operators in Python

 Operators that are used to set logical conditions (Logical Operators) in Python

the name of the employeehis codeExampleExplanation of the code
Logical ANDanda and bAre value  a and  b equal  True ?
Here, the two conditions must be met to return True
Logical ORora or bIs the value  a or  b or both equal  True ?
Here it is sufficient for one of the two conditions to be fulfilled to return True
Logical NOTnotnot aIs the value  a not worth  True ?
If the answer is yes, it will return True

Here we put an example for each factor in the table

Explain operators that are used to set Boolean conditions in Python

Here is a set of examples of each operator that is used to set Boolean conditions in Python.


Boolean operator   and (Logical AND Operator)

The operator  and is used to execute a specific code if the first condition and the second condition are met.

  • That is, if the result of the first condition is equal  True and the result of the second condition is equal, the  True code will be executed.

  • If the result of both conditions is not equal  True , the code will not run.


first example

Test.py
        a = 10
        b = 20

        # equals 20 The print command b will be executed equal to 10, and the value of the variable a The next condition means that if the value of the variable
        if a == 10 and b == 20:
        print('The first and the second conditions return True')

• We will get the following result when running.

The first and the second conditions return True

• We note that the printing command was executed because the answer to the two conditions in the sentence  if is  True.


second example

Test.py
        a = 10
        b = 20

        # equals 50 The print command b will be executed equal to 10, and the value of the variable a The next condition means that if the value of the variable
        if a == 10 and b == 50:
        print('The first and the second conditions return True')

• We will get the following result when running.


• We note that the print command was not executed because the answer to the second condition in the sentence  if is  False.

Boolean operator    or (Logical OR Operator)

An operator  or is used to execute a specific code if at least one of the conditions set is met.
So here it is sufficient for one of the two conditions to return the value  True in order for the placed orders to be executed.



first example

Test.py
        a = 10
        b = 20

        # equals 50 will execute the print command b equals 10, or the value of the variable a The following condition means that if the value of the variable
        if a == 10 or b == 50:
        print('One of the conditions return True')

• We will get the following result when running.

One of the conditions return True

• Execute the print command because the answer to the first condition in the sentence  if is  True.


second example

Test.py
        a = 10
        b = 20

        # equals 50 The print command b will be executed equal to 50, or the value of the variable a The next condition means that if the value of the variable
        if a == 50 or b == 50:
        print('One of the conditions return True')

• We will get the following result when running.


• We note that the printing command was not executed because the answer to the first and second conditions in the sentence  if is  False.

Boolean operator    not (Logical NOT Operator)

An operator  not is used to execute a specific code if any condition that is set is not met.
That is, if one or all of the placed conditions return the value  False , the placed orders will be executed.


first example

Test.py
      a = 10

      # Not equal to 10 The print command a will be executed The following condition means that if the value of the variable is
      if not a == 10:
      print('The condition return False')

• We will get the following result when running.


• The print order has not been executed because the answer to the condition is  True.


second example

Test.py
      a = 10

      # not equal to 20 The print command a will be executed The following condition means that if the value of the variable is
      if not a == 20:
      print('The condition return False')

• We will get the following result when running.

The condition return False

• Execute the print command because the answer to the condition is  False.


third example

Test.py
      a = 30
      # Between 0 and 20 the print command a will be executed The following condition means that if a value is not
      if not 0 >= a <= 20:
      print('the condition return False')

• We will get the following result when running.

the condition return False

• Execute the print command because the answer to the condition is  False.


note

If you want to apply the  not to more than one variable, you must put the conditions in parentheses. That is how you should use it  not( ).

Fourth example

Test.py
      user = 'mhamad'
      code = 0000

      # The following condition means that if no specified condition is met, the print command will be executed
      if not(user == 'harmash' or code == 1234):
      print('Both conditions return False')

• We will get the following result when running.

Both conditions return False

• Execute the print command because the answer to both conditions is  False.