Operators
Operators take one or two values (or variables), perform an operation, and return a value. Let's check out a simple example of using an operator, just to clarify the terminology.
>>> 1 + 2
3
In this code:
+
is the operatorThe operation is addition
The input values are
1
and2
(the input values are also called operands)The result value is 3
Instead of using the values 1
and 2
directly in the operation, you can use variables. You can also use a variable to store the result of the operation, as the following example demonstrates:
>>> var a = 1; >>> var b = 2; >>> a + 1
2
>>> b + 2
4
>>> a + b
3
>>> var c = a + b; >>> c
3
The following table lists the basic arithmetic operators:
Operator symbol 
Operation 
Example 

+ 
Addition 
>>> 1 + 2 3 
 
Substraction 
>>> 99.99 – 11 88.99 
* 
Multiplication 
>>> 2 * 3
6

/ 
Division... 