Python Operators

A PEMDAS (Parenthesis, Exponential, Multiply, Division, Addition, Subtraction) rule is used for the precedence of operators in Python. Operators having same priority are evaluated from left to right.

1. Python Arithmetic Operator

   It is used for mathematical operations such as addition, substraction, multiplication and division etc.

   x = 10
   y = 5
   print('x + y =',x+y) #Addition
   print('x - y =',x-y) #Substraction
   print('x * y =',x*y) #Multiplication
   print('x / y =',x/y) #Division
   print('x // y =',x//y) #Floor Division
   print('x ** y =',x**y) #Exponent

2. Python Comparison Operators

   It is used to compare values between operands.

   x = 121
   y = 101
   print('x > y is',x>y) #Greater than
   print('x < y is',x= y is',x>=y) #Greater than equal to
   print('x <= y is',x<=y) #Less than equal to

3. Python Logical Operators

   x = True
   y = False
   print('x and y is',x and y) #if both are true
   print('x or y is',x or y) #if either one is true
   print('not x is',not x) #returns the complement

4. Python Bitwise Operators

   It is used to manipulate bit values

   a = 6
   b = 3
   print ('a=',a,':',bin(a),'b=',b,':',bin(b)) c = 0
   c = a & b
   print ("result of AND is ", c,':',bin(c))
   c = a | b
   print ("result of OR is ", c,':',bin(c))
   c = a ^ b
   print ("result of EXOR is ", c,':',bin(c))
   c = ~a
   print ("result of COMPLEMENT is ", c,':',bin(c))
   c = a << 2
   print ("result of LEFT SHIFT is ", c,':',bin(c))
   c = a>>2
   print ("result of RIGHT SHIFT is ", c,':',bin(c))

5. Python Membership Operators

   Test for membership in a sequence

   a = 5
   b = 10
   list = [1, 2, 3, 4, 5 ]
   if ( a in list ):
       print ("Line 1 - a is available in the given list")
   else:
       print ("Line 1 - a is not available in the given list")
   if ( b not in list ):
       print ("Line 2 - b is not available in the given list")
   else:
       print ("Line 2 - b is available in the given list")

6. Python Identity Operators

   It checks if values on either side of equality operator point to the same object.

   a = 14
   b = 14
   print ('Line 1','a=',a,':',id(a), 'b=',b,':',id(b))
   if ( a is b ):
      print ("Line 2 - a and b have same identity")
   else:
      print ("Line 2 - a and b do not have same identity")