List Operations

Post by **admin** » Mon May 27, 2024 9:16 am

# Creating a list of integers

# Creating a list of integers
numbers = [1, 2, 3, 4, 5]
print("List of integers:", numbers)

# Creating a list of strings

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# Creating a list of strings
fruits = ['apple', 'banana', 'orange', 'kiwi']
print("List of fruits:", fruits)

# Creating a mixed-type list

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# Creating a mixed-type list
mixed_list = [1, 'hello', 3.14, True, ['nested', 'list']]
print("Mixed list:", mixed_list)

# Accessing elements in a list

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# Accessing elements in a list
print("First number:", numbers[0])  # Output: 1
print("Third fruit:", fruits[2])    # Output: orange
print("Nested value:", mixed_list[4][1])  # Output: list

#Modifying the List

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#Modifying the List
my_list = [1, 2, 3]
additional_elements = [4, 5, 6]
my_list.extend(additional_elements)
print("Modified list:", my_list)

# Slicing a list

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# Slicing a list
subset = numbers[1:4]
print("Sliced list (index 1 to 3):", subset)

# Length of a list

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# Length of a list
length = len(fruits)
print("Length of fruit list:", length)

# Checking if an element is in a list

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# Checking if an element is in a list
is_apple_present = 'apple' in fruits
print("Is 'apple' present?:", is_apple_present)

# Removing an element by value

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# Removing an element by value
fruits.remove('banana')
print("After removing 'banana':", fruits)

# Removing an element by index

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# Removing an element by index
removed_element = numbers.pop(1)
print("Removed element:", removed_element)
print("List after pop:", numbers)

# Concatenating lists

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# Concatenating lists
combined_list = numbers + fruits
print("Combined list:", combined_list)

# Repetition of a list

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# Repetition of a list
repeated_list = numbers * 2
print("Repeated list:", repeated_list)

# Sorting a list

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# Sorting a list
sorted_numbers = sorted(numbers)
print("Sorted numbers:", sorted_numbers)

# Reversing a list

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# Reversing a list
reversed_fruits = list(reversed(fruits))
print("Reversed fruits:", reversed_fruits)

# Iterating over a list

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# Iterating over a list
print("All fruits:")
for fruit in fruits:
    print(fruit)

# List comprehension

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# List comprehension
squared_numbers = [x ** 2 for x in numbers]
print("Squared numbers:", squared_numbers)

# Nested lists

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# Nested lists
matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
print("Matrix:", matrix)

# Accessing elements in a nested list

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# Accessing elements in a nested list
print("Element at row 2, column 3:", matrix[1][2])  # Output: 6

# List of monthly expenses

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expenses = [12000, 15000, 10000, 9000]
print("First month:", expenses[0])

# Adding a new expense

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expenses.append(11000)
print("Updated expenses:", expenses)

# Insert a value at index 1

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expenses.insert(1, 13000)
print("After insert:", expenses)

# Remove an expense

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expenses.remove(10000)
print("After removing 10000:", expenses)

# Total expenditure using sum()

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print("Total expenditure:", sum(expenses))