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    Topic Flashback                                                    21 st  Century   #Critical Thinking
                                                                                                     Skills
                            Circle the incorrect variable  in the following code:

                            Roll no = 201    Student Name = "Chirag"    Section = 'A'

                     DATA TYPES

                     A data type specifies the type of value a variable can contain. For example, a person’s name must be
                     stored as a string value, whereas the person’s age must be stored as an integer.
                     Data types in Python are:
                         int: Positive or negative whole numbers (without any fractions). Example: a = 3, b= -5

                         float: Any positive or negative real number in which a fraction is denoted by a decimal number.
                       Example: a = 3.5
                         string: A string value is a collection of one or more characters enclosed in single or double quotes.
                       Example: a="hello"
                     COMMENTS IN PYTHON

                     Comments in Python can be used to explain parts of the code. It can also be used to hide the code as
                     well. Comments enable us to understand the way a program works. In Python, any statement starting
                     with the # symbol is known as a comment. Python does not execute comments. Comments are not a
                     part of the program, but they do enhance the interactivity of the program and make it readable. Python
                     supports two types of comments: single-line comments and multiline comments.

                     Single-line Comment

                     In case a user wants to specify a single-line comment, then the comment must start with the symbol #.
                     Example:
                         Program:                                         Output:

                         # printing a string                              Hello World
                         print("Hello world")

                     Multiple-line Comment

                     Python does not have a dedicated syntax for multiline comments. To add a multiple-line comment, you
                     could insert a # for each line. Example:
                            Program :                                     Output :

                            #printing a string                            Rakesh
                            #print two names                              Rachna
                            print("Rakesh")
                            print("Rachna")

                     However, the text written inside triple quotes (''' or ''"") is also considered a comment. You can use the
                     triple quotes to write multiline comments. For example:

                                      '''This is                         """This is
                                         Multiline              OR          Multiline
                                         Comment'''                         Comment"""

                                                                                               Introduction to Python   89

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