Python Programming - Lab Part A
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Program 1: Program to check if a given number belongs to the Fibonacci sequence *
python
def fabo(n):
a = 0
b = 1
while (b<n):
temp = b
b += a
a = temp
return b==n or n==0
n = int(input("Enter a number: "))
if fabo(n):
print(f"{n} belongs to Fibonacci Sequence.")
else:
print(f"{n} does not belongs to Fibonacci Sequence.")Try it out
python
def fabo(n):
a = 0
b = 1
while (b<n):
temp = b
b += a
a = temp
return b==n or n==0
n = int(input("Enter a number: "))
if fabo(n):
print(f"{n} belongs to Fibonacci Sequence.")
else:
print(f"{n} does not belongs to Fibonacci Sequence.")Show Output
Enter a number: 15
15 does not belongs to Fibonacci Sequence.Alternative Code
python
import math as m
def isPerfectSquare(n):
val = int(m.sqrt(n))
return val * val == n
def isFibo(x):
return isPerfectSquare(5 * x * x + 4) or isPerfectSquare(5 * x * x - 4)
num = int(input("Enter your Number:"))
if(isFibo(num)):
print("Yes, given number", num, "occurs in the Fibonacci series")
else:
print("No, given number", num, "is not a Fibonacci number")Try it out
python
import math as m
def isPerfectSquare(n):
val = int(m.sqrt(n))
return val * val == n
def isFibo(x):
return isPerfectSquare(5 * x * x + 4) or isPerfectSquare(5 * x * x - 4)
num = int(input("Enter your Number:"))
if(isFibo(num)):
print("Yes, given number", num, "occurs in the Fibonacci series")
else:
print("No, given number", num, "is not a Fibonacci number")Program 2: Program to solve Quadratic equation.
python
import math as m
def quad(a, b, c):
discriminant = b**2 - 4*a*c
if discriminant >= 0:
root1 = (-b + m.sqrt(discriminant)) / (2*a)
root2 = (-b - m.sqrt(discriminant)) / (2*a)
return (root1, root2)
else:
return None
a = float(input("Enter Coefficient for x^2[a]: "))
b = float(input("Enter Coefficient for x[b] : "))
c = float(input("Enter Constant Term[c] : "))
roots = quad(a, b, c)
if roots is not None:
print(f"The roots of the equation {a} x^2 + {b} x + {c} = 0 are {roots[0]:.2f} and {roots[1]:.2f}")
else:
print("The given equation has no real roots")Show output
Enter Coefficient for x^2[a]: 1 Enter Coefficient for x[b] : 6 Enter Constant Term[c] : 9 The roots of the equation 1.0 x^2 + 6.0 x + 9.0 = 0 are -3.00 and -3.00
Try it out
python
import math as m
def quad(a, b, c):
discriminant = b**2 - 4*a*c
if discriminant >= 0:
root1 = (-b + m.sqrt(discriminant)) / (2*a)
root2 = (-b - m.sqrt(discriminant)) / (2*a)
return (root1, root2)
else:
return None
a = float(input("Enter Coefficient for x^2[a]: "))
b = float(input("Enter Coefficient for x[b] : "))
c = float(input("Enter Constant Term[c] : "))
roots = quad(a, b, c)
if roots is not None:
print(f"The roots of the equation {a} x^2 + {b} x + {c} = 0 are {roots[0]:.2f} and {roots[1]:.2f}")
else:
print("The given equation has no real roots")Program 3: Program to find the Sum of n Natural number. *
python
n = int(input("Enter a Natural Number: "))
sum_of_n_number = n*(n+1)//2
print(f"The sum of the first {n} natural number: {sum_of_n_number}")Show Output
Enter a Natural Number: 5
The sum of the first 5 natural number: 15Try it out
python
n = int(input("Enter a Natural Number: "))
sum_of_n_number = n*(n+1)//2
print(f"The sum of the first {n} natural number: {sum_of_n_number}")Program 4: Program to Display Multiple Tables. *
python
num = int(input("Enter a Number: "))
for i in range(1,11):
print(f"{num} x {i} = {num*i}")Show Output
Enter a Number: 5
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 = 50Try it out
python
num = int(input("Enter a Number: "))
for i in range(1,11):
print(f"{num} x {i} = {num*i}")Program 5: Program to check if the given number is Prime or not. *
python
def is_prime(num):
if num <= 1:
return False
for i in range(2, num):
if num % i == 0:
return False
return True
n = int(input("Enter a Number: "))
if is_prime(n):
print(f"{n} is a Prime number.")
else:
print(f"{n} is not a Prime number.")Show Output
Enter a Number: 15
15 is not a Prime number.Try it out
python
def is_prime(num):
if num <= 1:
return False
for i in range(2, num):
if num % i == 0:
return False
return True
n = int(input("Enter a Number: "))
if is_prime(n):
print(f"{n} is a Prime number.")
else:
print(f"{n} is not a Prime number.")Program 6: Program to implement a Sequential Search. *
python
def search(lst, key):
for i in range(len(lst)):
if lst[i] == key:
return i
return -1
num = list(map(int, input("Enter number separated with a Space: ").split()))
key = int(input("Enter a number to be Searched: "))
result = search(num, key)
if result != -1:
print(f"Elements found at Position : {result + 1}")
else:
print("Element not found in the list")Show Output
Enter number separated with a Space: 1 2 5 3 0
Enter a number to be Searched: 3
Elements found at Position : 4Try it out
python
def search(lst, key):
for i in range(len(lst)):
if lst[i] == key:
return i
return -1
num = list(map(int, input("Enter number separated with a Space: ").split()))
key = int(input("Enter a number to be Searched: "))
result = search(num, key)
if result != -1:
print(f"Elements found at Position : {result + 1}")
else:
print("Element not found in the list")Alternative Code
python
list = list(map(str, input("Enter multiple items seperated by space: ").split()))
target = input("Search for: ")
for i in list:
if i == target:
print(f"Found at index {list.index(i)}")
break
else:
print(f"{target} not found.")Try it out
python
list = list(map(str, input("Enter multiple items seperated by space: ").split()))
target = input("Search for: ")
for i in list:
if i == target:
print(f"Found at index {list.index(i)}")
break
else:
print(f"{target} not found.")Program 7: Program to create a Calculator *
python
def add(x, y):
return x + y
def sub(x, y):
return x - y
def mul(x, y):
return x * y
def div(x, y):
if y != 0:
return x / y
else:
return "Undefined! Can't divide by Zero"
while True:
print("\n-----------------")
print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")
print("5. QUIT")
print("-----------------")
choice = input("\nEnter Choice: ")
if choice == '5':
print("\nExiting The Program!")
break
num1 = float(input("Enter First Number: "))
num2 = float(input("Enter Second Number: "))
if choice == '1':
print("\nThe Result: ", add(num1, num2))
elif choice == '2':
print("\nThe Result: ", sub(num1, num2))
elif choice == '3':
print("\nThe Result: ", mul(num1, num2))
elif choice == '4':
print("\nThe Result: ", div(num1, num2))
else:
print("\nINVALID INPUT!")Show Output
-----------------
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. QUIT
-----------------
Enter Choice: 1
Enter First Number: 5
Enter Second Number: 10
The Result: 15.0
-----------------
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. QUIT
-----------------
Enter Choice: 3
Enter First Number: 10
Enter Second Number: 15
The Result: 150.0
-----------------
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. QUIT
-----------------
Enter Choice: 5
Exiting The Program!Try it out
python
def add(x, y):
return x + y
def sub(x, y):
return x - y
def mul(x, y):
return x * y
def div(x, y):
if y != 0:
return x / y
else:
return "Undefined! Can't divide by Zero"
while True:
print("\n-----------------")
print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")
print("5. QUIT")
print("-----------------")
choice = input("\nEnter Choice: ")
if choice == '5':
print("\nExiting The Program!")
break
num1 = float(input("Enter First Number: "))
num2 = float(input("Enter Second Number: "))
if choice == '1':
print("\nThe Result: ", add(num1, num2))
elif choice == '2':
print("\nThe Result: ", sub(num1, num2))
elif choice == '3':
print("\nThe Result: ", mul(num1, num2))
elif choice == '4':
print("\nThe Result: ", div(num1, num2))
else:
print("\nINVALID INPUT!")Alternative Code
python
while True:
print("Calculator")
op = input("Enter Operation ('+', '-', '*', '/', 'quit'): ")
if op == 'quit':
break
num1=float(input("Enter Operand 1: "))
num2=float(input("Enter Operand 2: "))
expr = f"{num1} {op} {num2}"
print(expr, " = ", eval(expr))Try it out
python
while True:
print("Calculator")
op = input("Enter Operation ('+', '-', '*', '/', 'quit'): ")
if op == 'quit':
break
num1=float(input("Enter Operand 1: "))
num2=float(input("Enter Operand 2: "))
expr = f"{num1} {op} {num2}"
print(expr, " = ", eval(expr))Program 8: Program to explore String Functions *
python
str = input("Enter a string: ")
print("Capital string: ", str.capitalize())
print("Upper string: ", str.upper())
print("Lower string: ", str.lower())
print("Is string AlphaNumeric? ", str.isalnum())
print("Is string Numeric? ", str.isnumeric())
substring = input("Enter substring to search: ")
print(f"Substring '{substring}' found at index: {str.find(substring)}")
old_sub = input("Enter old substring to replace: ")
new_sub = input("Enter new substring: ")
print("Replaced String: ", str.replace(old_sub, new_sub))
print("List of Words: ", str.split())Show Output
Enter a string: Hello
Capital string: Hello
Upper string: HELLO
Lower string: hello
Is string AlphaNumeric? True
Is string Numeric? False
Enter substring to search: lo
Substring 'lo' found at index: 3
Enter old substring to replace: llo
Enter new substring: hi
Replaced String: Hehi
List of Words: ['Hello']Try it out
python
str = input("Enter a string: ")
print("Capital string: ", str.capitalize())
print("Upper string: ", str.upper())
print("Lower string: ", str.lower())
print("Is string AlphaNumeric? ", str.isalnum())
print("Is string Numeric? ", str.isnumeric())
substring = input("Enter substring to search: ")
print(f"Substring '{substring}' found at index: {str.find(substring)}")
old_sub = input("Enter old substring to replace: ")
new_sub = input("Enter new substring: ")
print("Replaced String: ", str.replace(old_sub, new_sub))
print("List of Words: ", str.split())Program 9: Program to implement Selection Sort. *
python
def selection_sort(lst):
for i in range(len(lst)):
min_index = i
for j in range(i+1, len(lst)):
if lst[j] < lst[min_index]:
min_index = j
lst[i], lst[min_index] = lst[min_index], lst[i]
return lst
numbers = list(map(int, input("Enter numbers seperated by space: ").split()))
sorted_numbers = selection_sort(numbers)
print("Sorted List: ", sorted_numbers)Show Output
Enter numbers seperated by space: 10 200 30 45 1 2 4 7 3
Sorted List: [1, 2, 3, 4, 7, 10, 30, 45, 200]Try it out
python
def selection_sort(lst):
for i in range(len(lst)):
min_index = i
for j in range(i+1, len(lst)):
if lst[j] < lst[min_index]:
min_index = j
lst[i], lst[min_index] = lst[min_index], lst[i]
return lst
numbers = list(map(int, input("Enter numbers seperated by space: ").split()))
sorted_numbers = selection_sort(numbers)
print("Sorted List: ", sorted_numbers)Program 10: Program to implement Stack. *
python
# Empty stack
stack = []
while True:
print("""
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
""")
ch = int(input("Enter choice: "))
match ch:
case 1:
num = int(input("Enter number to push: "))
stack.append(num)
case 2:
if len(stack) < 1:
print("Stack is empty, nothing to pop")
else:
print("Popped Value: ", stack.pop())
case 3:
if len(stack) < 1:
print("Stack is empty")
else:
print("Top Value: ", stack[-1])
case 4:
print("Stack: ", stack)
case 5:
break # Breaks the loop. Match case doesn't support break/continue
case _: # Equivalent to else
print("Invalid Choice. Please try again")Show Output
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
Enter choice: 1
Enter number to push: 500
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
Enter choice: 3
Top Value: 500
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
Enter choice: 1
Enter number to push: 232
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
Enter choice: 1
Enter number to push: 50
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
Enter choice: 4
Stack: [500, 232, 50]
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
Enter choice: 2
Popped Value: 50
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
Enter choice: 5Try it out
python
# Empty stack
stack = []
while True:
print("""
1: Push
2: Pop
3: Peek
4: Display Stack
5: Exit
""")
ch = int(input("Enter choice: "))
match ch:
case 1:
num = int(input("Enter number to push: "))
stack.append(num)
case 2:
if len(stack) < 1:
print("Stack is empty, nothing to pop")
else:
print("Popped Value: ", stack.pop())
case 3:
if len(stack) < 1:
print("Stack is empty")
else:
print("Top Value: ", stack[-1])
case 4:
print("Stack: ", stack)
case 5:
break # Breaks the loop. Match case doesn't support break/continue
case _: # Equivalent to else
print("Invalid Choice. Please try again")Program 11: Read and Write into a File
python
def accept_details():
students = [] # List of dict values
while True:
student = {}
student['name'] = input("Enter student name (q to exit): ")
if student['name'].lower() == 'q':
break
student['roll_number'] = input("Enter Roll Number: ")
student['marks'] = float(input("Enter marks: "))
students.append(student)
return students
def write_details(students):
with open('student_details.txt', 'w') as file:
for student in students:
file.write(student['name'] + ',')
file.write(student['roll_number'] + ',')
file.write(str(student['marks']) + '\n')
def display_details():
with open('student_details.txt', 'r') as file:
print("Name\tRoll Number\tMarks")
for line in file:
name, roll_number,marks=line.strip().split(',')
print(f"{name}\t{roll_number}\t{marks}")
students = accept_details()
write_details(students)
display_details()Show Output
Enter student name (q to exit): Souhrud
Enter Roll Number: 026
Enter marks: 80
Enter student name (q to exit): John
Enter Roll Number: 000
Enter marks: 50
Enter student name (q to exit): q
Name Roll Number Marks
Souhrud 026 80.0
John 000 50.0Try it out
python
def accept_details():
students = [] # List of dict values
while True:
student = {}
student['name'] = input("Enter student name (q to exit): ")
if student['name'].lower() == 'q':
break
student['roll_number'] = input("Enter Roll Number: ")
student['marks'] = float(input("Enter marks: "))
students.append(student)
return students
def write_details(students):
with open('student_details.txt', 'w') as file:
for student in students:
file.write(student['name'] + ',')
file.write(student['roll_number'] + ',')
file.write(str(student['marks']) + '\n')
def display_details():
with open('student_details.txt', 'r') as file:
print("Name\tRoll Number\tMarks")
for line in file:
name, roll_number,marks=line.strip().split(',')
print(f"{name}\t{roll_number}\t{marks}")
students = accept_details()
write_details(students)
display_details()