Information Programming

 Lists • In Python lists are used to store multiple items in a single variable. • Lists are initialised within square brackets [ ]. • Lists are ordered,mutable (i.e can be changed) and allow duplicate values. Syntax to create list :                 mylist = [ 1,2,3, 'A','B' ] • We can also access elements in list by indexing :        In :  print (mylist[0])      Out :  1 • We can also change item values in list as :        In :  mylist[ 1 ] = ' C '         print (mylist)       Out :  [ 1,'C',3,'A','B' ] Common Functions performed on Lists are as follows : Examples on above functions are as follows :

 STRINGS Strings are sequence of characters enclosed within single quotes ( '   ' ) or double quotes ("   "). We can display strings with print function.   F or example:   Input:  mystr= "Hello World!"                       print( mystr )                                            OR                                  Input: print( "Hello World!" )                                            Output:    Hello World! In Python we can write multiline strings using triple quotes  ( ' ' '      ' ' '  ). For example :  Input:     mystr = ''' ...

 PYTHON NUMBERS Python numbers are combination of Integers , Floating point numbers and Complex numbers. The Numbers are defined as int, float and complex class in python. We use type() function to check whether which class a variable belongs to. Taking Input from user in Python : In Python we can take input from user by using 'input' keyword. Refer Following example for better understanding.

 OPERATORS An operator in a programming language is a symbol that tells the compiler or interpreter to perform specific mathematical, relational or logical operation and produce final result. Types of Operators : 1) Arithmetic Operators : Addition Operator : ' + ' Subtraction Operator : ' - '  Division Operator : ' / ' Multiplication Operator : ' * '      Following are examples of Arithmetic Operators 2) Relational Operators : Greater than : ' > ' Less than : ' < ' Equals : ' == ' Greater than Equal to : ' >= ' Less than Equal to : ' <= ' Not Equal to : ' != '          Following is the example of Relational Operators : 3) Logical Operators : And Operator : ' & '  (  It returns TRUE if both the operands are True ) Or Operator : ' | '    (  It returns TRUE if either of the operand is True ) Following is the example of Logical Operators :   In Python w...

 Variables Variables are temporary Storage spaces. In Python we can always reassign a variable. Python uses dynamic typing that means it can reassign variable name to different data types. Variable assignment in Python: note : Following code is executed in Jupiter notebook. note : To run particular cell in Jupiter Notebook press SHIIFT + ENTER. note : We can check type of a variable using type keyword in Python. We can assign variable in python as follows: syntax:   var_name = value In above example student variable is assigned to two different data types.