Types of Operators in Python
Python provides us 7 popular types of operators:
· Arithmetic Operators
· Relational or Comparison Operators
· Logical Operators
· Assignment Operator
· Compound Operator
· Identity Operators
· Membership Operators
Today we, discuss about Assignment Operator, Compound Operator, Identity Operator, Membership Operator :
· Assignment Operators
· Various Types of Assignment Operators
· Compound Operators
· Identity Operators
· Membership Operators
Assignment Operators In Python
— The Python Assignment Operators are used to assign the values to the declared variables.
— Equals (=) operator is the most commonly used assignment operator in Python.
— For example:
a=10
— Shortcut for assigning same value to all the variables
x = y = z = 10
— Shortcut for assigning different value to all the variables
x,y,z = 10,20,30
Guess the Output :
a,b,c = 10,20
print(a, b, c)
Output:
ValueError : Not enough values to unpack
a,b,c = 10,20,30,40
print(a, b, c)
Output:
ValueError : Too many values to unpack
Compound Assignment Operators
— Python allows us to combine arithmetic operators as with assignment operator.
— For example: The statement
x = x + 5
— Can also be written as
x += 5
Operator |
Example | Meaning |
+= | x+=5 | x=x+5 |
-= | x-=5 | x=x-5 |
*= | x*=5 | x=x*5 |
/= | x/=5 | x=x/5 |
%= | x%=5 | x=x%5 |
//= | x//=5 | x=x//5 |
Guess the Output :
a=10
print(++a)
Output:
10
a=10
print(a++)
Output:
SyntaxError : Invalid Syntax
Conclusion:
Python does not has any increment operator like ++. Rather it is solved as +(+x) i.e +(+10) which is 10.
However, the expression a++ is an error as it doesn’t make any sense.
Guess the Output :
a=10
print(--a)
Output:
10
a=10
print(a--)
Output:
SyntaxError : Invalid Syntax
Conclusion:
Python does not have any decrement operator like --.
Rather it is solved as -(-x) i.e -(-10) which is 10
However, the expression a-- is an error as it doesn’t make any sense.
Guess the Output :
a=10
print(+++++a)
Output:
10
a=10
print(-----a)
Output:
-10
Try to figure out yourself the reason for these outputs
Identity Operators
— Identity operators in Python are is and is not
— They serve 2 purposes:
· To verify if two references point to the same memory location or not
· To determine whether a value is of a certain class or type
Behavior of is and is not
— The operator is returns True if the operands are identical, otherwise, it returns False.
— The operator is not return True if the operands are not identical, otherwise, it returns False.
Examples of is Operator :
a=2
b=3
c=a is b
print(c)
Output:
False
Explanation:
Since a and b are pointing to 2 different objects, so
the operator is returns False
a=2
b=2
c=a is b
print(c)
Output:
True
Explanation:
Since a and b are pointing to the same objects, so the operator is returns True
a=2
b=type(a) is int
print(b)
Output:
True
Explanation:
type(a) is int evaluates to True because 2 is indeed an integer number.
a=2
b=type(a) is float
print(b)
Output:
False
Explanation:
type(a) is float evaluates to False because 2 is not a float number.
Examples of is not Operator :
a=“Digital”
b=“Digital”
c=a is not b
print(c)
Output:
False
Explanation:
Since a and b are pointing to the same object, so
the operator is not return False.
a=“Digital”
b=“digital”
c=a is not b
print(c)
Output:
True
Explanation:
Since a and b are pointing to 2 different objects, so
the operator is not return True.
Membership Operators
— Membership operators are used to testing whether a value or variable is found in a sequence (string, list, tuple, set, and dictionary).
— There are 2 Membership operators
— in
— not in
The behavior of in and not in
— in: The ‘in’ operator is used to check if a value exists in a sequence or not
— not in : The ‘not in’ operator is the opposite of ‘in’ operator. So, if a value does not exists in the sequence then it will return a True else it will return a False.
Examples of in Operator
a=“Welcome”
b=“om”
print(b in a)
Output:
True
a=“Welcome”
b=“mom”
print(b in a)
Output:
False
primes=[2,3,5,7,11]
x=4
print(x not in primes)
Output:
True
primes=[2,3,5,7,11]
x=5
print(x not in primes)
Output:
False
And if you have any doubt regarding this topic then, you can ask your doubt in the comment section, I will respond to you as soon as possible.
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