First Python Program, Comments & Keywords in Python – Beginner Guide2026
First Python Program, Comments & Keywords in Python
Introduction
Python is one of the easiest programming languages to learn.
It has a simple syntax, making it ideal for beginners. In this tutorial, you
will learn how to write your first Python program, understand comments, and
explore Python keywords.
By the end of this guide, you'll know how to create a basic
program, write readable code using comments, and understand the importance of
reserved keywords in Python.
Table of Contents
- What is a Python Program?
- Writing
Your First Python Program
- How
to Run a Python Program
- Python
Comments
- Types
of Comments
- Python
Keywords
- List
of Python Keywords
- Example
Programs
- Best
Practices
- Advantages
- Disadvantages
- Interview
Questions
- FAQs
- Conclusion
What is a Python Program?
A Python program is a set of instructions written in Python
that tells the computer what to do. Every Python file usually has the
extension:
.py
Example:
hello.py
Writing Your First Python Program
The first program every beginner writes is the Hello
World program.
print("Hello, World!")
Output
Hello, World!
Explanation
- print()
is a built-in Python function.
- It
displays text on the screen.
- Text
is written inside quotation marks.
Another Example
print("Welcome to Python")
print("Learning Python is Easy")
Output
Welcome to Python
Learning Python is Easy
How to Run a Python Program
Method 1 – Using IDLE
- Open
Python IDLE.
- Click
File → New File.
- Write
the program.
- Save
as hello.py.
- Press
F5.
- View
the output.
Method 2 – Using VS Code
- Open
VS Code.
- Install the Python extension.
- Create
a new .py file.
- Write
the code.
- Click
Run.
Python Comments
Comments are notes written inside the program. They are
ignored by Python.
Comments help programmers understand the code.
Single-Line Comment
# This is a comment
print("Hello")
Multi-Line Comment
"""
This is a
multi-line comment.
"""
print("Python")
Another way:
'''
This is
another comment.
'''
print("Programming")
Why Use Comments?
- Makes
code easier to understand.
- Helps
during debugging.
- Improves
teamwork.
- Explains
complex logic.
- Makes
maintenance easier.
Python Keywords
Keywords are reserved words with predefined meanings.
They cannot be used as variable names.
Example:
if
else
for
while
True
False
None
Python Keywords List
|
Keyword |
Description |
|
False |
Boolean false value |
|
True |
Boolean true value |
|
None |
Represents no value |
|
if |
Conditional statement |
|
else |
Alternative condition |
|
elif |
Multiple conditions |
|
for |
Loop |
|
while |
Loop |
|
break |
Exit loop |
|
continue |
Skip iteration |
|
return |
Return value |
|
def |
Define function |
|
class |
Create class |
|
import |
Import module |
|
try |
Exception handling |
|
except |
Handle exceptions |
|
finally |
Always executes |
|
pass |
Empty statement |
|
lambda |
Anonymous function |
|
global |
Global variable |
|
nonlocal |
Outer variable |
|
and |
Logical operator |
|
or |
Logical operator |
|
not |
Logical operator |
|
in |
Membership operator |
|
is |
Identity operator |
Example
# First Python Program
print("Welcome to Python")
name = "John"
if name == "John":
print("Hello
John")
else:
print("Unknown User")
Output
Welcome to Python
Hello John
Common Beginner Mistakes
- Forgetting
quotation marks.
- Wrong
indentation.
- Using
keywords as variable names.
- Incorrect
spelling of print().
- Mixing
tabs and spaces.
Best Practices
- Write
meaningful comments.
- Keep
programs simple.
- Use
proper indentation.
- Use
descriptive variable names.
- Remove
unnecessary comments.
- Follow
Python coding standards (PEP 8).
- Test
your code regularly.
Advantages
- Easy
to learn.
- Simple
syntax.
- Readable
code.
- Supports
multiple programming styles.
- Large
community.
- Extensive
libraries.
- Cross-platform.
Disadvantages
- Slower
than some compiled languages.
- Higher
memory usage.
- Not
ideal for some mobile app development.
- Dynamic
typing can lead to runtime errors.
Interview Questions
1.] What is a Python program?
A Python program is a collection of Python instructions
executed by the Python interpreter.
2.] Which function displays output?
print()
3.] What are comments?
Comments are notes ignored by the interpreter.
4.] Which symbol starts a single-line comment?
#
5.] Can keywords be variable names?
No.
6.] What is the file extension of Python?
.py
7.] What is if?
A conditional keyword.
8. ] What is import?
It imports a module.
9.] What is True?
A Boolean keyword.
10.] Why are comments important?
They improve readability and maintainability.
Frequently Asked Questions (FAQs)
1. What is Python?
Python is a high-level, interpreted programming language.
2. What is the first Python program?
The "Hello, World!" program.
3. What are Python comments?
Comments explain code and are ignored by the interpreter.
4. Can Python have multi-line comments?
Yes, triple quotes are commonly used.
5. What are keywords?
Reserved words with predefined meanings.
6. Can I create a variable named if?
No.
7. How many keywords does Python have?
The exact number depends on the Python version.
8. Which function prints output?
print()
9. Is Python case-sensitive?
Yes.
10. Why should beginners learn Python?
Because it is easy to read, write, and widely used.
Conclusion
Writing your first Python program is the first step toward becoming a Python developer. Understanding comments improves code readability, while learning keywords helps you avoid common mistakes. Practice writing small programs every day to build confidence and strengthen your programming skills.
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