🐍 Python Programs for PSEB 2026 Computer Science

Class 11 & 12 Students | Step-by-step Full Programs
Aligned with PSEB Syllabus 2026-27 (Basic Concepts, Data Types, Operators, Control Statements, Practical Activities)

1. Absolute Basics (Chapter 2)

# My First Python Program
print("Hello World")
print("Welcome to PSEB Computer Science 2026")

# Program to print student details
name = "Dishant Singh"
class_name = "11th"
school = "Govt. Senior Secondary School"

print("Name:", name)
print("Class:", class_name)
print("School:", school)
print("Subject: Computer Science")

# This is a single-line comment
"""
This is a multi-line comment
Used for longer explanations
"""

# Variables
student_name = "Aman"      # String
age = 16                   # Integer
marks = 85.5               # Float
is_pass = True             # Boolean

print("Name:", student_name)
print("Age:", age)
print("Marks:", marks)
print("Passed:", is_pass)

2. Input, Output & Operators (Chapter 3)

# Program to take name as input
name = input("Enter your name: ")
print("Hello", name)
print("Welcome to Python programming!")

# Program to add two numbers
a = 10
b = 20
sum_result = a + b
print("First number =", a)
print("Second number =", b)
print("Sum =", sum_result)

# Program to add two numbers taken from user
a = int(input("Enter first number: "))
b = int(input("Enter second number: "))
sum_result = a + b
print("Sum =", sum_result)
print("Difference =", a - b)
print("Product =", a * b)
print("Quotient =", a / b)
print("Integer Division =", a // b)
print("Remainder =", a % b)
print("Power =", a ** b)

# Calculate area of rectangle and circle
length = float(input("Enter length of rectangle: "))
breadth = float(input("Enter breadth of rectangle: "))
rect_area = length * breadth
print("Area of Rectangle =", rect_area)

radius = float(input("Enter radius of circle: "))
circle_area = 3.14 * radius * radius
print("Area of Circle =", circle_area)

# Different data types in Python
num_int = 25
num_float = 25.5
num_complex = 3 + 4j
text = "Python"
is_true = True
empty = None

print(type(num_int))
print(type(num_float))
print(type(num_complex))
print(type(text))
print(type(is_true))
print(type(empty))

3. Conditional Statements (Chapter 4)

# Check if a number is even or odd
num = int(input("Enter a number: "))

if num % 2 == 0:
    print(num, "is Even")
else:
    print(num, "is Odd")

# Find absolute value of a number
num = float(input("Enter a number: "))

if num < 0:
    abs_value = -num
else:
    abs_value = num

print("Absolute value =", abs_value)
# Alternative: print(abs(num))

# Find largest of two numbers
a = float(input("Enter first number: "))
b = float(input("Enter second number: "))

if a > b:
    print("Largest is", a)
elif b > a:
    print("Largest is", b)
else:
    print("Both numbers are equal")

# Find largest of three numbers
a = float(input("Enter first number: "))
b = float(input("Enter second number: "))
c = float(input("Enter third number: "))

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

print("The largest number is", largest)

# Check divisibility
num = int(input("Enter a number: "))
divisor = int(input("Enter divisor: "))

if num % divisor == 0:
    print(num, "is divisible by", divisor)
else:
    print(num, "is not divisible by", divisor)

# Check if person is eligible to vote
age = int(input("Enter your age: "))

if age >= 18:
    print("You are eligible to vote")
else:
    print("You are not eligible to vote")
    print("You can vote after", 18 - age, "years")

4. Loops (for and while)

# Simple for loop
print("Numbers from 1 to 5:")
for i in range(1, 6):
    print(i)

# Sum of first n numbers
n = int(input("Enter a number: "))
total = 0

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

print("Sum of first", n, "numbers =", total)

# Calculate factorial
n = int(input("Enter a positive number: "))
fact = 1

for i in range(1, n + 1):
    fact = fact * i

print("Factorial of", n, "=", fact)

# Print multiplication table
num = int(input("Enter a number: "))

print("Multiplication Table of", num)
for i in range(1, 11):
    print(num, "x", i, "=", num * i)

# Right angle triangle pattern
rows = int(input("Enter number of rows: "))

for i in range(1, rows + 1):
    for j in range(1, i + 1):
        print("*", end=" ")
    print()  # New line after each row

# Countdown using while loop
count = int(input("Enter a number to countdown: "))

while count > 0:
    print(count)
    count = count - 1

print("Blast Off!")

5. Important Syllabus Practical Programs

# Check if a number is prime
num = int(input("Enter a number: "))

if num <= 1:
    print(num, "is not a prime number")
else:
    is_prime = True
    for i in range(2, int(num**0.5) + 1):
        if num % i == 0:
            is_prime = False
            break
    
    if is_prime:
        print(num, "is a Prime number")
    else:
        print(num, "is not a Prime number (Composite)")

# Print Fibonacci series
n = int(input("How many terms? "))

a, b = 0, 1
print("Fibonacci Series:")
for i in range(n):
    print(a, end=" ")
    a, b = b, a + b
print()

# Check if number is palindrome
num = int(input("Enter a number: "))
original = num
reverse = 0

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

if original == reverse:
    print(original, "is a Palindrome")
else:
    print(original, "is not a Palindrome")

# Check Armstrong number (3 digits)
num = int(input("Enter a 3-digit number: "))
original = num
sum_cubes = 0

while num > 0:
    digit = num % 10
    sum_cubes += digit ** 3
    num = num // 10

if original == sum_cubes:
    print(original, "is an Armstrong number")
else:
    print(original, "is not an Armstrong number")

# Find GCD of two numbers
a = int(input("Enter first number: "))
b = int(input("Enter second number: "))

while b != 0:
    a, b = b, a % b

print("GCD is", a)

6. Bonus: Simple Functions (Class 12 Preview)

# Simple function example
def add_numbers(x, y):
    """Function to add two numbers"""
    result = x + y
    return result

# Using the function
num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
sum_result = add_numbers(num1, num2)
print("Sum =", sum_result)

# Simple calculator with functions
def add(a, b):
    return a + b

def subtract(a, b):
    return a - b

def multiply(a, b):
    return a * b

def divide(a, b):
    if b != 0:
        return a / b
    else:
        return "Cannot divide by zero"

a = float(input("Enter first number: "))
b = float(input("Enter second number: "))
op = input("Enter operator (+, -, *, /): ")

if op == '+':
    print("Result =", add(a, b))
elif op == '-':
    print("Result =", subtract(a, b))
elif op == '*':
    print("Result =", multiply(a, b))
elif op == '/':
    print("Result =", divide(a, b))
else:
    print("Invalid operator")