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PERFORMING OPERATIONS ON VARIABLES
                  A variable is a storage area that holds data. Its data type defines its size, layout, range of
                  values, and the set of operations that can be performed on it.

                  Once you declare a variable with a specific data type, you can perform operations on it
                  using suitable operators.
                      Operator: It is a symbol which operates on a value assigned to a variable. Example: +,-, *, \.

                      Operand: It is a value on which the operator performs an operation.

                  Arithmetic Operators
                  Arithmetic operation combines two or more numeric expressions by using the arithmetic
                  operators. The  arithmetic  operators perform  operations  such  as: addition,  subtraction,
                  multiplication,  division,  and  modulus.  In  the  table given  below,  we  are taking,  value  of
                  variable a= 10, and of b=30:

                     Operation         Symbol                       Description                         Example
                   Addition               +        Adds one operand to the other                         a+b= 40
                   Subtraction             -       Subtracts second operand from the first               a-b= -20

                   Multiplication                  Multiplies one operand by the second                 a*b=  300
                   Exponentiation                  Raises first operand to power of second           a ** b = 10**  30
                   Division               /        Divides first operand by the second                    b/a= 3

                                                   Divides first operand by the second, removes
                   Floor Division         //                                                            a // b = 0
                                                   decimal part
                   Modulus                %        Divides the first operand by the second,              b%a= 0
                                                   and returns the remainder
                  Assignment Operators

                  An assignment operator assigns a new value to a variable.
                  In the table given below, we are taking, value of variable a=10, and b=30.

                          Operator             Symbol              Description                      Example
                   Simple assignment               =      Assigns value to the left  c = a + b (c = 10 + 30)
                   operator                               operand from right operand.       will assign the value of
                                                                                            c to a + b (c = 40)
                   Add AND assignment             +=      Adds the right operand to the  b + = a (b + = 10) is
                   operator                               left operand and assign the  equivalent to b = b + a
                                                          result to the left operand.       (b = 30 + 10) (b = 40)
                   Subtract AND                   -=      Subtracts the right operand  b – = a (b– = 10) is
                   assignment operator                    from the left operand and  equivalent to b = b – a
                                                          assigns the result to the left  (b=30-10) (b=20)
                                                          operand.






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