Python Operators

Python programming is provide various operators to deal with mathematical,logical,comparison operation. so that is very important to how to use those operators in our program. operator is work on specified operands. operands can be a value and object.

#1 and 2 is operands
print(1+2) #+ Operator
value1=2
value2=3
#value1 and value2 is operands
print(value1*value2) #* Operator

Output

3
6

Arithmetic Operators

For example

a=5
b=8
print("a =",a,"b =",b)
print("a+b",a+b) #add
print("a-b",a-b)
print("a*b",a*b)
print("a/b",a/b)
print("a**b",a**b) #a power b
print("a//b",a//b) #a power b
print("a%b",a%b)

Output

a = 5 b = 8
a+b 13
a-b -3
a*b 40
a/b 0.625
a**b 390625
a//b 0
a%b 5

Comparison Operators

a=4
b=2
print("a =",a,"b =",b)
print("a==b",a==b) 
print("a>=b",a>=b)
print("a<=b",a<=b)
print("a!=b",a!=b)
print("ab",a>b)

Output

a = 4 b = 2
a==b False
a>=b True
a<=b False
a!=b True
a<b False
a>b True

some of python 3 interpreter are display syntax error to work with (<>) operator. see this example.

a=4
b=2
print("a =",a,"b =",b)
print(a<>b)

python3 test.py
  File "test.py", line 4
    print(a<>b)
            ^
SyntaxError: invalid syntax

But It will work on python 2 version.

python2 test.py
('a =', 4, 'b =', 2)
True

Assignment Operators

For example

def resetData():
  global a
  a=4
  global b
  b=5

a=4
b=5
print("a =",a,"b=",b)

a+=b
print("a+=b","a =",a," b=",b)
resetData()

a-=b
print("a-=b","a =",a," b=",b)
resetData()

a*=b
print("a*=b","a =",a," b=",b)
resetData()

a/=b
print("a/=b","a =",a," b=",b)
resetData()

a%=b
print("a%=b","a =",a," b=",b)
resetData()

a**=b
print("a**=b","a =",a," b=",b)
resetData()

a//=b
print("a//=b","a =",a," b=",b)
resetData()

Output

a = 4 b= 5
a+=b a = 9  b= 5
a-=b a = -1  b= 5
a*=b a = 20  b= 5
a/=b a = 0.8  b= 5
a%=b a = 4  b= 5
a**=b a = 1024  b= 5
a//=b a = 0  b= 5

Logical Operators

For example.

print(4 and 5)
print(0 and 1)
print(4 or 5)
print(3 or 5)
print(4 not in [1,3,7])
print(7 not in [1,3,7])

Output

5
0
4
3
True
False

Bitwise Operators

Other operator

// operator: Normal division of two number the resultant of python interpreter is float result. When we skipping the fraction part then we can use // (double forward slash).

result=9/2
print(result)
result=9//2 
print(result)

Output

4.5
4

** operator: This operator are used to calculate power of numeric value.

print(3**4) #3^4 = (3X3X3X3) = 81
print(3.2**3)# 3.2^3 = (3.2*3.2*3.2) = 32.768

Output

81
32.76800000000001