Python Basics 01

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Python is very easy to use and  it can be used for arithmetic operations. in this section lets look how we can use python as a calculator. This section is described three sections.

Python Basics 01 :- Python Oprerators
Python Basics 02 :- Python Data types, Variables and other basics (This will be discussed in next section)

Python Basics 01 :- Python Operators

An operator is a symbol that is used for calculations. In simple 3 + 5  3 and 5 are operands and + is the operator.Python language supports following type of operators.

• Arithmetic Operators
• Comparision Operators
• Logical (or Relational) Operators
• Assignment Operators 
• Conditional (or ternary) Operators

Python Arithmetic Operators

Operator	Description	Example
+	Addition - Adds values on either side of the operator	a + b will give 30
-	Subtraction - Subtracts right hand operand from left hand operand	a - b will give -10
*	Multiplication - Multiplies values on either side of the operator	a * b will give 200
/	Division - Divides left hand operand by right hand operand	b / a will give 2
%	Modulus - Divides left hand operand by right hand operand and returns remainder	b % a will give 0
**	Exponent - Performs exponential (power) calculation on operators	a**b will give 10 to the power 20
//	Floor Division - The division of operands where the result is the quotient in which the digits after the decimal point are removed.	9//2 is equal to 4 and 9.0//2.0 is equal to 4.0

Now let's see some examples in python IDE. (click here to see how the python GUI is opened)

Here after I will not put any screen shots of the GUI. I will put only the code as follows.

>>> 2 + 3
5
>>> 3 - 1
2
>>> 2 * 5
10

Python Comparison Operators

Operator	Description	Example
==	Checks if the value of two operands are equal or not, if yes then condition becomes true.	(a == b) is not true.
!=	Checks if the value of two operands are equal or not, if values are not equal then condition becomes true.	(a != b) is true.
<>	Checks if the value of two operands are equal or not, if values are not equal then condition becomes true.	(a <> b) is true. This is similar to != operator.
>	Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true.	(a > b) is not true.
<	Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true.	(a < b) is true.
>=	Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true.	(a >= b) is not true.
<=	Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.	(a <= b) is true.

To get an more idea please go to http://www.tutorialspoint.com/python/python_basic_operators.htm