Lists in Python

Publicado em: 06 Fevereiro 2022
no canal de: Parag Dhawan

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In Python, a list is an ordered collection of elements, which can be of different types. Lists are mutable, meaning you can add, remove, or change elements in the list after it has been created.

In Python, lists are denoted by square brackets [], and each element in the list is separated by a comma. Here's an example of a list:

my_list = [1, 2, 3, "four", 5.0]
In this example, the list has five elements: the integers 1, 2, and 3, the string "four", and the float 5.0.

You can access an element in a list by using square brackets [] and providing the index of the element you want to access. The index of the first element in a list is 0, and the index of the last element is the length of the list minus one. For example:

print(my_list[0]) # Output: 1
print(my_list[3]) # Output: "four"

You can also modify an element in a list by using square brackets [] and providing the index of the element you want to modify. For example:

my_list[4] = 6.0
print(my_list) # Output: [1, 2, 3, "four", 6.0]

To add an element to the end of a list, you can use the append() method. For example:

my_list.append("seven")
print(my_list) # Output: [1, 2, 3, "four", 6.0, "seven"]

To insert an element at a specific position in a list, you can use the insert() method. For example:

my_list.insert(2, "two")
print(my_list) # Output: [1, 2, "two", 3, "four", 6.0, "seven"]

To remove an element from a list, you can use the remove() method and provide the value of the element you want to remove. For example:

my_list.remove("four")
print(my_list) # Output: [1, 2, "two", 3, 6.0, "seven"]

You can also loop through the elements of a list using a for loop. For example:

for element in my_list:
print(element)

Finally, you can check if an element is in a list using the in keyword. For example:

print(2 in my_list) # Output: True
print("nine" in my_list) # Output: False

Lists are ordered collection of elements stored in [].
List are mutable.
You can access individual elements of the lists using indexing and multiple elements from the list using slicing.
you can add elements at the end of the list using append method.
you can remove elements from the list using pop method.
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