Python Programs on Lists

Write a python program to perform following operations on a list of integers.

1. Print the total number of items in the list.
2. Print the last item in the list.
3. Print the list in reverse order.
4. Print Yes if the list contains a 5 and No otherwise.
5. Print the number of occurrences of a element in the list.
6. Remove the first and last items from the list and sort the remaining items.
7. Print how many integers in the list is less than a given value?
8. Print the average of the elements in the list.
9. Print the largest and smallest value in the list.

Logic:

1. The len() function returns the number of characters in a string, including spaces and special characters.
2. list[-1]: Access the last element using the index -1.
3. Use list slicing with a step of -1 to reverse the list.
   list[::-1]
4. Use the in operator to check if 5 is present in the list.
5. Use the count() method to count occurrences of a specified element.
6. Slice the list to exclude the first and last elements list[1:-1], then use the sort() method to sort the remaining elements.
7. Use a list comprehension or loop to count elements less than the given value (e.g., 7).
8. Compute the sum of elements using sum() and divide by the number of elements.
9. Use the max() and min() functions to find the largest and smallest values.

Program:

Copy

########## Lists #################
# Sample list of integers
numbers = [10, 3, 5, 8, 5, 12, 1]

# (b) Print the total number of items in the list
print("Total number of items in the list:", len(numbers))

# (c) Print the last item in the list
print("Last item in the list:", numbers[-1])

# (d) Print the list in reverse order
print("List in reverse order:", numbers[::-1])

# (e) Print Yes if the list contains a 5, No otherwise
if 5 in numbers:
    print("Yes")
else:
    print("No")

# (f) Print the number of occurrences of an element (e.g., 5)
element = 5
print("Number of occurrences of {element}:", numbers.count(element))

# (g) Remove the first and last items, then sort the remaining items
modified_list = numbers[1:-1]
modified_list.sort()
print("List after removing first and last items and sorting:", modified_list)

# (h) Print how many integers are less than a given value (e.g., 7)
given_value = 7
count_less_than = sum(1 for num in numbers if num < given_value)
print("Number of integers less than {given_value}:", count_less_than)

# (i) Print the average of the elements in the list
average = sum(numbers) / len(numbers)
print("Average of the elements:", average)

# (j) Print the largest and smallest value in the list
print("Largest value:", max(numbers))
print("Smallest value:", min(numbers))

Output: