Operators are special symbols in python which are responsible for a particular operation between two or more operands.Operators are more helpful for doing operations between two operands.We will learn everything about different type of operators in python with examples.

value of a+b= 11**e.g.**```
a=5;b=6;
c=a+b
print("value of a+b= ",c)
```

**:-**__Output of above program__**:- In above program**

__Descriptions__operators -->

**=,+**

operands -->

**a,b,c**

There are many variety of operators present in python as follows:-

**1.)**:

__Arithmetic operators__
Arithmetic operators are used to perform arithmetic operations like addition,

subtraction,multiplication and division etc.There are some arithmetic operators

as follows:-

value of c= 31

value of d= 19

value of e= 150

value of f= 4.166666666666667

value of g= 1

value of h= 4

**e.g.**```
a=25
b=6
#addition
c=a+b
print("value c= ",c)
#substraction
d=a-b
print("valueof d= ",d)
#multiplication
e=a*b
print("value of e= ",e)
#division
f=a/b
print("value of f= ",f)
#modulous
g=a%b
print("value of g= ",g)
#floor division
h=a//b
print("value of h= ",h)
```

**:-**__Output of above Python program__value of c= 31

value of d= 19

value of e= 150

value of f= 4.166666666666667

value of g= 1

value of h= 4

**2.)**:-

__Comparison operators__Comparison operators are used to compare the value of two operands and returns Boolean value

**True**or

**False**according to the condition.

There are some comparison operators as follows:-

**e.g.**

```
a=25
b=20
#Equal to
c=a==b
print("value a==b",c)
#greater than
d=a>b
print("value a>b",d)
#less than
e=a<b
print("value a<b",e)
#greater than eual to
g=a>=b
print("value a>=b",g)
#less than equal to
h=a<=b
print("value a<=b",h)
```**
**

**:-**

__Output of above python program__value a==b False

value a>b True

value a<b False

value a>=b True

value a<=b False

**3.)**

__Logical operators____:-__

In python,AND ,OR & NOT operators are called logical operators.This is used primarily in the expression evaluation to make a decision.

**e.g.**

```
a=25
b=20
#Equal to
c=a==b
print("value a==b",c)
#greater than
d=a>b
print("value a>b",d)
#less than
m=a
```**=b
print("value a>=b",g)
#less than equal to
h=a<=b
print("value a<=b",h)
**

**:**

__Output of above python program__value of a and b= False

value of a or b= True

value of not a= False

value of not b= True

value of a and b= 0

value of a or b= 1

value of not a= False

value of not b= True

**4.)**:-

__Assignment operators__The assignment operators are used to assign value to variables in python.It is used to assign the value of right operand to left operand.

**e.g.**

**a = 5**

(left operand)=(right operand)

**5.)**:-The Bitwise operators perform bit by bit operation on the values of the two operands.

__Bitwise operators__**e.g.**

We have to know truth table of AND ,OR,NOT & XOR first.It is given as below:-

**AND (Y=AB)**:-

**OR (Y=A+B)**:-

**NOT (Y=~A)**:-

**XOR(Y=**

**AB + AB**

**)**:-

Binary value =

**1 1 1 1 1 1**

Decimal value= 2^5

**+**2^4

**+**2^3

**+**2^2

**+**2^1

**+**2^0

**e.g.**

```
a=10 #(0000 1010 binary value)
b=5 #(0000 0101 binary value)
print("value of a&b=",a&b)
print("value of a|b=",a|b)
print("value of ~a & ~b=",~a,~b)
print("value of a⊕b=",a^b)
print("value of a⊕b=",a^b)
print("value of right shift a>>2=",a>>2)
print("value of right shift b>>2=",b>>2)
print("value of left shift a<<2",a<<2)
print("value of left shift a<<2",a<<2)
```

**:-**

__Output of above python program__value of a&b= 0

value of a|b= 15

value of ~a & ~b= -11 -6

value of a⊕b= 15

value of a⊕b= 15

value of right shift a>>2= 2

value of right shift b>>2= 1

value of left shift a<<2 40

value of left shift b<<2 20

**6.)**

__Membership operators__:-python membership operators are used to check the membership of value inside a python data structure.If the value is present in data structure,then returns

**True**otherwise

**False**.

**e.g.**

```
a='welcome to MNT LAB'
b={1:'x',2:'y'}
print('w' in a) #output True
print('come' in a) #output True
print('MNT' in a) #output True
print('msdotnet' in a) #output False
print(1 in b) #output True
print(3 in b) #output False
print(2 in b) #output True
print('x' in b) #output False because it apply on key not value
```

**:-**

__Output of above python program__True

True

True

False

True

False

True

False

**7.)**:-

__Identity operators__Identity operators are used to check if two variables (or values) are located on the same part of the memory.Two variables that are equal ,it does not imply they are identical.

**e.g.**

```
a=6
b=6
c='welcome'
d='welcome'
e=[4,5,6]
f=[4,5,6]
print(a is not b) #output False
print(a is b) #output Ture
print(c is d) #output True
print(c is not d) #output false
print(e is not f) #output True
print(e is f) #output false
```

**:-**

__Output of above python program__False

True

True

False

True

False

**:-**

__Descriptions__- a&b are integers of same values,so this are equal as well as identical.
- c&d are strings of same values,so this is eual as well identical.
- e&f are list.It is equal but not identical because interpreter locates them separately in memory although they are equal.

**8.) O**:-

__perator Precedence__The precedence of operators is more imported to find which operator should be evaluated first in any mathematical operation(arithmetic operation).The precedence table of operators in python given below:-

__:-I have explained some functions of time module in our previous post.You can read it previous post from here.In this notes we will learn gmtime() function of time module.__

**Special Notes****gmtime()**-->This function takes the argument in seconds and returns the struct time in**UTC**(universal time coordinated).If we passed zero argument in this function then it returns struct time of your current system time in UTC.There are many time zone present in the worlds.Each country have its own time zone.But they use only one**UTC**time. Asian and European Country have one time zone that is called**Greenwich time**(gmt) zone.British county uses BST (British summer time) zone. BST time is ahead one hour from Greenwich time .

**e.g.**

```
#gmt=greenwich time,utc=universal time coordinated
import time
seconds=time.time()
second1=time.localtime()
greenwich_time=time.gmtime(1587537544) #(gmtime()function takes the aguments in
print("local time in UTC=\n",second1) #seconds and returns the struct_time in UTC)
print('')
print("Given time(seconds)in UTC=\n",greenwich_time)
print('')
print(" current system time in seconds",seconds)
```

**:-**

__Output of above python program__#gmt=greenwich time,utc=universal time coordinated

import time

seconds=time.time()

second1=time.localtime()

greenwich_time=time.gmtime(1587537544) #(gmtime()function takes the aguments in

print("local time in UTC=\n",second1) #seconds and returns the struct_time in UTC)

print('')

print("Given time(seconds)in UTC=\n",greenwich_time)

print('')

print(" current system time in seconds",seconds)

__Watch Lecture 11 complete video__:-
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