The Fundamentals of Variables and Data Types | Python Tutorial #1
In Python, a variable is a name that refers to a value. Variables are used to store data values in programs. You can think of a variable as a named container that holds a value.
To create a variable in Python, you just need to give it a name and assign it a value using the equals sign (=).
It's important to choose descriptive and meaningful names for your variables to make your code easy to read and understand.
In Python, there are several built-in data types that you can use to store values in your programs. These data types include:
int: stands for integer and represents positive or negative whole numbers (without a decimal point). For example: 10, -20, 0.
float: stands for floating point number and represents numbers with a decimal point. For example: 10.5, -0.5, 3.14159.
str: stands for string and represents a sequence of characters (text). You can use single or double quotes to create a string. For example: 'Hello, World!', "Hello, World!", '123'.
bool: stands for boolean and represents a value of True or False.
list: represents an ordered collection of items. Lists are created using square brackets and the items are separated by commas. Lists are mutable, which means you can change their content. For example: [1, 2, 3], ['apple', 'banana', 'orange'], [True, False].
tuple: represents an ordered collection of items, just like a list. However, tuples are immutable, which means you cannot change their content. Tuples are created using parentheses and the items are separated by commas. For example: (1, 2, 3), ('apple', 'banana', 'orange'), (True, False).
dict: stands for dictionary and represents a collection of key-value pairs. Dictionaries are created using curly braces and the items are separated by commas. The key and value are separated by a colon. Dictionaries are mutable. For example: {'name': 'John', 'age': 30}, {1: 'apple', 2: 'banana', 3: 'orange'}.