python operators

Operator	Description	Example
+ Addition	Adds values on either side of the operator.	a + b = 30
– Subtraction	Subtracts right hand operand from left hand operand.	a – b = -10
* Multiplication	Multiplies values on either side of the operator	a * b = 200
/ Division	Divides left hand operand by right hand operand	b / a = 2
% Modulus	Divides left hand operand by right hand operand and returns remainder	b % a = 0
** Exponent	Performs exponential (power) calculation on operators	a**b =10 to the power 20
//	Floor Division – integer division	9//2 = 4 and 9.0//2.0 = 4.0, -11//3 = -4, -11.0//3 = -4.0

Comparison Operators

Operator	Meaning	Example
>	Greater that – True if left operand is greater than the right	x > y
<	Less that – True if left operand is less than the right	x < y
==	Equal to – True if both operands are equal	x == y
!=	Not equal to – True if operands are not equal	x != y
>=	Greater than or equal to – True if left operand is greater than or equal to the right	x >= y
<=	Less than or equal to – True if left operand is less than or equal to the right	x <= y

Python Logical OperatorsRead More »

python data collection type

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List is a collection which is ordered and changeable. Allows duplicate members.

Written with square brackets []
can access the list items by referring to the index number [0,1,2, etc]
use len() to find out how many elements are in the list
use listname.append() to add new values
use listname.insert(index, “value”) to insert a new item in a specific position
use listname.remove(“value”) to remove a specified value
use listname.pop(index) to remove a value from specific index position ; if not specified, it takes the last value
use listname.clear() to empty the list
use listname.sort() to sort the list