Practicals

Practical Programs

1.  Write a python program to add the elements of the two lists. 

Code:

# Define two lists

list1 = [1, 2, 3, 4, 5]

list2 = [10, 20, 30, 40, 50]

# Initialize an empty list to store the sum

sum = []

# Using a for loop to add elements

for i in range(len(list1)):

         sum.append(list1[i] + list2[i])

# Print the result

print("Sum of elements:", sum)

Output:

Sum of elements: [11, 22, 33, 44, 55]

2.  Write a Python program to create a list, add an element, extend the list with multiple elements, and remove an element. 

Code:

# Creating an empty list

fruits = []

# Using append() to add single elements

fruits.append("Apple")

fruits.append("Banana")

# Using extend() to add multiple elements

fruits.extend(["Mango", "Orange", "Grapes"])

# Printing the list after adding elements

print("Fruits List after append and extend:", fruits)

# Using remove() to delete an element

fruits.remove("Orange")

# Printing the final list

print("Fruits List after remove:", fruits)

Output:

Fruits List after append and extend: ['Apple', 'Banana', 'Mango', 'Orange', 'Grapes']

 Fruits List after remove: ['Apple', 'Banana', 'Mango', 'Grapes']

3.  Write a Python program to display all the names from a list of names whose length is of four  characters.

Code:

# List of names

names = ["John", "Mike", "Sara", "Anna", "Chris", "Ella", "Tom"]

# Loop through the list to find names with length 4

for n in names:

        if len(n) == 4:

                 print(n)

Output:

John

Mike

Sara

Anna

Ella

4.  Write a Python program to compute total marks from the marks of different subjects stored in the form of a list.

Code:

# List of Marks

marks = [93, 78, 69, 71, 65]

print("Marks are:", marks)

# Initialize a value to the variable

total = 0

# Using a for loop to compute total marks

for sm in marks:

       total = total + sm

# Print the result

print(" The total marks are:", total)

Output:

Marks are: [93, 78, 69, 71, 65]

The total marks are: 376

5.  Write a Python program which convert all the odd numbers in the list to even by adding 1.

Code:

# List of numbers

numbers = [3, 7, 8, 12, 15, 21, 26]

# Loop through the list using index

for i in range(len(numbers)):

    if numbers[i] % 2 != 0:

        numbers[i] += 1

# Print the updated list

print("List after converting odd numbers to even:", numbers)

Output:

List after converting odd numbers to even: [4, 8, 8, 12, 16, 22, 26]

6.  Write a Python program that performs the following tasks: 

• Accepts a string input from the user.

• Counts and displays the number of vowels in the string.

• Reverses the string and displays the reversed version.

Code:

# Read a string from the user

text = input("Enter a string: ")

# Initialize vowel count

count = 0

# Define vowels

vowels = "aeiouAEIOU"

# Count vowels

for char in text:

       if char in vowels:

            count += 1

# Reverse the string

reverse = text[::-1]

# Display results

print("Number of vowels:", count)

print("Reversed string:", reverse)

Output:

Enter a string: Artificial Intelligence

 Number of vowels: 10

 Reversed string: ecnegilletnI laicifitrA

7. Write a Python program that performs the following tasks:

• Counts and displays the number of lowercase (small case) alphabets in a given string.

• Checks and displays whether the input string is a palindrome or not.

Code:

# Accept input string from the user

text = input("Enter a string: ")

# Count lowercase letters

count = 0

for char in text:

       if char.islower():

              count += 1

# Output the results

print("Number of lowercase letters:", count)

# Convert the sting to lowercase

T = text.lower()

# Check for palindrome

if T == T[::-1]:

       print("The string is a palindrome.")

else:

       print("The string is not a palindrome.")

Output:

Enter a string: Malayalam

Number of lowercase letters: 8

The string is a palindrome.

Enter a string: Program

Number of lowercase letters: 6

The string is not a palindrome.

8. Write a Python program which display only those names from the list which have 'i' as second last character.

 Code:

# Sample list of names

names = ["Pritii", "Risi", "Nidhi", "Anvik", "Rani", "Ritia"]

# Display names with 'i' as the second last character

print("Names with 'i' as the second last character:")

for n in names:

      if len(n) >= 2 and n[-2] == 'i':

            print(n)

Output:

Names with 'i' as the second last character:

Pritii

Anvik

Ritia

9. Write a python program which removes the last element from the list and it in the beginning. 

Code:

# Sample list

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

# Check if list is not empty

if items !=[ ]:

    last = items.pop()       # Remove last element

    items.insert(0, last)    # Insert at the beginning

# Display deleted item

print("Deleted Item:", last)

# Display updated list

print("Updated list:", items)

Output:

Deleted Item: 50

Updated list: [50, 10, 20, 30, 40]