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Learn how to create and use lists in Python, one of the four built-in data types for storing collections of data. Lists are ordered, changeable and allow duplicates, and can contain different data types.
- 11 min
- Creating a List in Python. Lists in Python can be created by just placing the sequence inside the square brackets[]. Unlike Sets, a list doesn’t need a built-in function for its creation of a list.
- Accessing elements from the List. In order to access the list items refer to the index number. Use the index operator [ ] to access an item in a list. The index must be an integer.
- Getting the size of Python list. Python len() is used to get the length of the list. Python3. List1 = [] print(len(List1)) List2 = [10, 20, 14] print(len(List2))
- Taking Input of a Python List. We can take the input of a list of elements as string, integer, float, etc. But the default one is a string. Example 1: Python3.
- Create a Python List. We create a list by placing elements inside square brackets [], separated by commas. For example, # a list of three elements ages = [19, 26, 29] print(ages) # Output: [19, 26, 29]
- Access List Elements. Each element in a list is associated with a number, known as a list index. The index always starts from 0, meaning the first element of a list is at index 0, the second element is at index 1, and so on.
- Add Elements to a Python List. We use the append() method to add elements to the end of a Python list. For example, fruits = ['apple', 'banana', 'orange'] print('Original List:', fruits)
- Change List Items. We can change the items of a list by assigning new values using the = operator. For example, colors = ['Red', 'Black', 'Green'] print('Original List:', colors)
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Jul 19, 2023 · Learn how to create, access, modify, and use lists in Python, a flexible and versatile built-in data type. This tutorial covers the basics of lists, as well as advanced topics such as slicing, copying, sorting, and comprehensions.
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