Page 433 - ComputerScience_Class_11

• Name Storage: Each variable has a name that points to a value stored in memory.
• Changeable Values: The value stored in a variable can be modified at any time during the program.
6. Define an Integrated Development Environment (IDE).
Ans. An Integrated Development Environment, commonly known as an IDE, is a software application that brings together all the
essential tools required for software development. It is designed to help programmers write, compile and debug their code in an
efficient manner. Most IDEs are created to support a specific programming language or a group of related languages. They provide
various features that assist in writing code, such as syntax highlighting, code completion and error detection. In addition to this,
IDEs often include version control tools that allow developers to track changes made to their programs.
7. Explain the advantages of Python in detail.
Ans. Python has various advantages. Here are a few advantages:
• Extensive Library: Python provides a very extensive standard library. This library is enormous and contains almost all the
functions one could ever require.
• Flexible: Python is a very flexible language. Hence, it allows the user to try new things and develop new sorts of applications.
It does not constrain the user from attempting something new. Python offers greater flexibility and freedom than other
programming languages, making it more preferred in certain situations.
• More Productive: Python is a very productive language, as its simplicity helps the developers concentrate on solving their
problems. Users do not need to spend hours learning the syntax and behaviour of the programming language; therefore,
more work is done.
8. What is meant by platform independent in Python?
Ans. Python is a platform-independent programming language. This means a program written in Python on one operating system can
run on another without making any changes. Python code is not directly converted into machine code; instead, it is executed by
the Python interpreter. The interpreter is available for various platforms such as Windows, Linux, macOS and UNIX. Therefore, the
same Python program can run on any system where Python is installed.
For example, to display the output in different operating systems:
• On Window:
print("Python works on all platforms")
• On Linux:
print("Python works on all platforms")
• On macOS:
print("Python works on all platforms")
9. Explain the types of comments in Python.
Ans. Here are the types of comments in Python:
• Single-line Comment: A single-line comment in Python is used to explain a line of code or give short information about the
program. It starts with the hash symbol (#).
Example: x = 10 # This is a single-line comment
• Multi-line Comment: A multi-line comment in Python is used to explain multiple lines of code or to write a detailed description
of a program. Python does not have a separate symbol only for multi-line comments, but triple quotes are commonly used for
this purpose.
Symbols used in multi-line comments are:
i. ''' (triple single quotes)
ii. """ (triple double quotes)
10. Explain the rules for naming variables in Python.
Ans. The rules for naming variables are given below:
• A variable name must start with a letter (A–Z or a–z) or an underscore (_).
• A variable name cannot start with a number.
• It can contain letters, numbers and underscores (_) only.
• Spaces are not allowed in variable names.
• Special characters like @, #, $, %, etc., are not allowed.
• A variable name cannot be a keyword (such as if, for, while, class, etc.).
• Variable names are case-sensitive, meaning name, Name and NAME are different variables.

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