50+ Python Lab Programs for Practical Exams

Published On: October 1, 2026

50+ Python lab programs for practical exams

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50+ Python Lab Programs for Practical Exams

A few words: Python lab exam is a significant subject matter related to student programming courses. All those students who have been trained in Python theory, but face trouble while writing programs during practical exams. Common Python lab programs are the best way to prepare before the exam.

50+ Simple Python Lab programs for practical exams with code and output is published by Kuntal Gupta. The covers basics of python, operators, conditional statements, loops, numbers, string lists tuples dictionaries functions patterns search and sort.

These python lab programs are also helpful for B.Tech students, computer science students, AIML students, diploma students as well as beginners to practice programming.

Why Practice Python Lab Programs?

Theory is different from practice. Writing programs by yourself teaches you syntax in python and learn how programming concepts are related.

Regular practice helps you:

Understand Python syntax

Improve logical thinking

Write programs faster

Find and fix errors

Prepare for practical exams

Prepare for viva questions

Improve coding confidence

Understand programming concepts

And most importantly, write the programs without looking at the solution before your practical exam.

1. Hello World Program

The Hello World program is one of the simplest Python programs.

print("Hello World")

Output

Hello World

2. Add Two Numbers

a = 10
b = 20

sum = a + b

print("Sum =", sum)

Output

Sum = 30

3. Subtract Two Numbers

a = 50
b = 20

result = a - b

print("Difference =", result)

Output

Difference = 30

4. Multiply Two Numbers

a = 10
b = 5

result = a * b

print("Product =", result)

Output

Product = 50

5. Divide Two Numbers

a = 20
b = 5

result = a / b

print("Division =", result)

Output

Division = 4.0

6. Check Even or Odd

This is one of the most common beginner-level Python lab programs.

number = 15

if number % 2 == 0:
    print("Even")
else:
    print("Odd")

Output

Odd

The % operator returns the remainder. If the remainder is zero after dividing by 2, the number is even.

7. Check Positive, Negative or Zero

number = -10

if number > 0:
    print("Positive")
elif number < 0:
    print("Negative")
else:
    print("Zero")

Output

Negative

8. Find Largest of Two Numbers

a = 25
b = 40

if a > b:
    print("Largest =", a)
else:
    print("Largest =", b)

Output

Largest = 40

9. Find Largest of Three Numbers

a = 10
b = 50
c = 30

if a > b and a > c:
    largest = a
elif b > c:
    largest = b
else:
    largest = c

print("Largest =", largest)

Output

Largest = 50

10. Check Leap Year

year = 2024

if year % 400 == 0 or (year % 4 == 0 and year % 100 != 0):
    print("Leap Year")
else:
    print("Not a Leap Year")

Output

Leap Year

11. Simple Calculator

a = 20
b = 10
operator = "+"

if operator == "+":
    print("Result =", a + b)
elif operator == "-":
    print("Result =", a - b)
elif operator == "*":
    print("Result =", a * b)
elif operator == "/":
    print("Result =", a / b)
else:
    print("Invalid operator")

Output

Result = 30

12. Print Numbers from 1 to 10

for i in range(1, 11):
    print(i, end=" ")

Output

1 2 3 4 5 6 7 8 9 10

13. Print Even Numbers

for i in range(2, 21, 2):
    print(i, end=" ")

Output

2 4 6 8 10 12 14 16 18 20

14. Print Odd Numbers

for i in range(1, 20, 2):
    print(i, end=" ")

Output

1 3 5 7 9 11 13 15 17 19

15. Multiplication Table

number = 5

for i in range(1, 11):
    print(number, "x", i, "=", number * i)

Output

5 x 1 = 5
5 x 2 = 10
5 x 3 = 15
5 x 4 = 20
5 x 5 = 25
5 x 6 = 30
5 x 7 = 35
5 x 8 = 40
5 x 9 = 45
5 x 10 = 50

16. Sum of Natural Numbers

total = 0

for i in range(1, 11):
    total += i

print("Sum =", total)

Output

Sum = 55

17. Factorial of a Number

number = 5
factorial = 1

for i in range(1, number + 1):
    factorial *= i

print("Factorial =", factorial)

Output

Factorial = 120

18. Fibonacci Series

a = 0
b = 1

for i in range(10):
    print(a, end=" ")
    a, b = b, a + b

Output

0 1 1 2 3 5 8 13 21 34

19. Reverse a Number

number = 12345
reverse = 0

while number > 0:
    digit = number % 10
    reverse = reverse * 10 + digit
    number //= 10

print("Reverse =", reverse)

Output

Reverse = 54321

20. Sum of Digits

number = 12345
total = 0

while number > 0:
    total += number % 10
    number //= 10

print("Sum =", total)

Output

Sum = 15

21. Count Digits

number = 123456
count = 0

while number > 0:
    count += 1
    number //= 10

print("Digits =", count)

Output

Digits = 6

22. Check Prime Number

number = 17
is_prime = True

if number < 2:
    is_prime = False

for i in range(2, int(number ** 0.5) + 1):
    if number % i == 0:
        is_prime = False
        break

if is_prime:
    print("Prime Number")
else:
    print("Not a Prime Number")

Output

Prime Number

23. Print Prime Numbers

for number in range(2, 51):

    is_prime = True

    for i in range(2, int(number ** 0.5) + 1):

        if number % i == 0:
            is_prime = False
            break

    if is_prime:
        print(number, end=" ")

Output

2 3 5 7 11 13 17 19 23 29 31 37 41 43 47

24. Check Palindrome Number

number = 121

if str(number) == str(number)[::-1]:
    print("Palindrome")
else:
    print("Not Palindrome")

Output

Palindrome

25. Armstrong Number

number = 153

digits = str(number)

total = sum(int(digit) ** len(digits) for digit in digits)

if total == number:
    print("Armstrong Number")
else:
    print("Not Armstrong Number")

Output

Armstrong Number

26. Find GCD

import math

a = 24
b = 36

print("GCD =", math.gcd(a, b))

Output

GCD = 12

27. Find LCM

import math

a = 12
b = 18

lcm = abs(a * b) // math.gcd(a, b)

print("LCM =", lcm)

Output

LCM = 36

28. Reverse a String

text = "Python"

print(text[::-1])

Output

nohtyP

29. Check String Palindrome

text = "madam"

if text == text[::-1]:
    print("Palindrome")
else:
    print("Not Palindrome")

Output

Palindrome

30. Count Vowels

text = "Python Programming"
count = 0

for char in text.lower():

    if char in "aeiou":
        count += 1

print("Vowels =", count)

Output

Vowels = 4

31. Convert String to Uppercase

text = "python programming"

print(text.upper())

Output

PYTHON PROGRAMMING

32. Find String Length

text = "Python"

print("Length =", len(text))

Output

Length = 6

33. Find Largest Element in a List

numbers = [10, 45, 23, 67, 12]

print("Largest =", max(numbers))

Output

Largest = 67

34. Find Smallest Element in a List

numbers = [10, 45, 23, 67, 12]

print("Smallest =", min(numbers))

Output

Smallest = 10

35. Find Sum of List Elements

numbers = [10, 20, 30, 40, 50]

print("Sum =", sum(numbers))

Output

Sum = 150

36. Sort a List

numbers = [50, 20, 40, 10, 30]

numbers.sort()

print(numbers)

Output

[10, 20, 30, 40, 50]

37. Remove Duplicate Elements

numbers = [1, 2, 2, 3, 3, 4]

unique = list(set(numbers))

print(unique)

Output

[1, 2, 3, 4]

The order may vary because sets are unordered.

38. Search an Element

numbers = [10, 20, 30, 40, 50]
target = 30

if target in numbers:
    print("Element Found")
else:
    print("Element Not Found")

Output

Element Found

39. Find Second Largest Number

numbers = [10, 20, 50, 40, 30]

numbers = list(set(numbers))
numbers.sort()

print("Second Largest =", numbers[-2])

Output

Second Largest = 40

40. Tuple Example

numbers = (10, 20, 30, 40)

print(numbers)
print(numbers[1])

Output

(10, 20, 30, 40)
20

41. Dictionary Example

student = {
    "name": "Rahul",
    "age": 20,
    "course": "B.Tech"
}

print(student["name"])
print(student["course"])

Output

Rahul
B.Tech

42. Set Union

a = {1, 2, 3}
b = {3, 4, 5}

print(a | b)

Output

{1, 2, 3, 4, 5}

43. Set Intersection

a = {1, 2, 3}
b = {2, 3, 4}

print(a & b)

Output

{2, 3}

44. Function to Add Two Numbers

def add(a, b):
    return a + b

print("Sum =", add(10, 20))

Output

Sum = 30

45. Function to Check Even Number

def is_even(number):
    return number % 2 == 0

print(is_even(10))

Output

True

46. Factorial Using Recursion

def factorial(n):

    if n == 0:
        return 1

    return n * factorial(n - 1)

print(factorial(5))

Output

47. Star Pattern

Pattern programs are commonly used to practice nested loops.

for i in range(1, 6):
    print("*" * i)

Output

*
**
***
****
*****

48. Number Pattern

for i in range(1, 6):

    for j in range(1, i + 1):
        print(j, end=" ")

    print()

Output

49. Bubble Sort

Bubble Sort compares neighboring elements and places them in the correct order.

numbers = [5, 3, 8, 1, 2]

for i in range(len(numbers)):

    for j in range(0, len(numbers) - i - 1):

        if numbers[j] > numbers[j + 1]:
            numbers[j], numbers[j + 1] = numbers[j + 1], numbers[j]

print(numbers)

Output

[1, 2, 3, 5, 8]

50. Linear Search

numbers = [10, 20, 30, 40, 50]
target = 40

found = False

for number in numbers:

    if number == target:
        found = True
        break

if found:
    print("Element Found")
else:
    print("Element Not Found")

Output

Element Found

51. Celsius to Fahrenheit

celsius = 30

fahrenheit = (celsius * 9 / 5) + 32

print("Fahrenheit =", fahrenheit)

Output

Fahrenheit = 86.0

52. Fahrenheit to Celsius

fahrenheit = 86

celsius = (fahrenheit - 32) * 5 / 9

print("Celsius =", celsius)

Output

Celsius = 30.0

53. Find Average of List

numbers = [10, 20, 30, 40, 50]

average = sum(numbers) / len(numbers)

print("Average =", average)

Output

Average = 30.0

54. Generate Random Number

import random

number = random.randint(1, 10)

print("Random Number =", number)

Sample Output

Random Number = 7

The output may be different each time because the number is generated randomly.

55. Create a Simple Class

class Student:

    def display(self):
        print("I am a student")

student = Student()

student.display()

Output

I am a student

Important Python Lab Topics for Practical Exams

When preparing for a Python practical examination, focus on the following topics:

Basic Python

Variables
Data types
Input and output
Operators
Type conversion

Conditional Statements

if
if-else
if-elif-else
Nested conditions

Loops

for
while
break
continue
range()

Number Programs

Even or odd
Prime number
Factorial
Fibonacci
Palindrome
Armstrong number
GCD
LCM
Reverse number
Sum of digits

String Programs

Reverse string
Palindrome
Vowel counting
String length
Case conversion
Character counting

Data Structures

Practice:

Lists
Tuples
Sets
Dictionaries

Functions

Understand:

Function definition
Parameters
Arguments
Return values
Recursive functions

Algorithms

Students should also practice basic:

Searching
Sorting
Linear Search
Bubble Sort

How to Prepare for a Python Practical Exam

A simple preparation method can save a lot of time before the practical examination.

Step 1: Learn the Syntax

Understand basic Python syntax first.

Step 2: Practice Basic Programs

Start with addition, subtraction, even/odd, largest number, and other simple programs.

Step 3: Practice Loops

Learn how to use for and while loops.

Step 4: Practice Number Programs

Practice factorial, Fibonacci, prime, palindrome, Armstrong, and other number programs.

Step 5: Practice Data Structures

Learn common operations on lists, tuples, sets, and dictionaries.

Step 6: Practice Functions

Write programs using functions and return values.

Step 7: Practice Without Notes

Before the exam, select random problems and try to write the complete program without checking your notes.

Common Mistakes in Python Lab Exams

Students often lose time because of small coding mistakes.

Some common mistakes are:

Incorrect indentation
Missing colon :
Incorrect variable names
Forgetting brackets
Using the wrong operator
Incorrect loop range
Mixing strings and numbers
Forgetting to convert input using int() or float()
Using the wrong indentation level

For example:

if number > 10:
print(number)

This produces an indentation problem.

The correct version is:

if number > 10:
    print(number)

Tips to Score Better in Python Practical Exams

Understand the Question First

Read the question carefully before starting the program.

Write the Logic

Think about the steps needed to solve the problem.

Use Meaningful Variables

Instead of confusing variable names, use names such as:

number
total
average
largest
count

Test Your Program

Run the program with sample values and check the output.

Don’t Panic About Errors

Read the error message carefully. Python usually tells you which line has a problem.

Practice Common Programs

Programs such as factorial, Fibonacci, prime numbers, palindrome, Armstrong number, sorting, and searching are good exercises for improving programming logic.

Frequently Asked Questions

What are Python lab programs?

Python lab programs are practical coding exercises used to help students learn and demonstrate Python programming concepts.

Are these programs useful for practical exams?

Yes. These programs cover common beginner-level Python concepts that are useful for laboratory practice and programming assignments.

Who can practice these Python programs?

B.Tech students, diploma students, computer science students, AIML students, beginners, and anyone learning Python can practice these programs.

Can beginners understand these programs?

Yes. Most programs use simple Python syntax and are arranged from basic concepts to slightly more advanced topics.

Where can I run Python programs?

You can run them using Python IDLE, VS Code, PyCharm, Jupyter Notebook, Google Colab, or another Python environment.

Conclusion

Preparing for a Python practical exam becomes easier when you practice programs regularly. Instead of only studying theory, write the programs yourself and understand how each line works.

These 50+ Python lab programs for practical exams cover important topics such as variables, operators, conditional statements, loops, number programs, strings, lists, tuples, sets, dictionaries, functions, searching, sorting, and patterns.

Start with the basic programs and gradually move to more difficult problems. Try different inputs, modify the programs, and practice writing them without looking at the solution.

The main goal is not to memorize code. The goal is to understand the logic behind the program so that you can solve similar questions during your practical examination.

Keep practicing Python programs, test your code regularly, and build your confidence one program at a time.