Variables
Variables:
In Python, a variable is a name that refers to a value stored in memory. Unlike many other programming languages, you don’t need to specify the data type of a variable in Python. To create a variable in Python, you simply choose a name for the variable and use the equals sign (=) to assign a value to it. For example:
x = 5
y = "hello"
Variables
In this example, x is a variable that holds an integer value, and y is a variable that holds a string value.
Variable names in Python can contain letters, numbers, and underscores, but must start with a letter or underscore. Python is case-sensitive, so x and X are considered two different variables. There are some reserved words in Python that can’t be used as variable names, such as if, else, while, for, def, class, and import.
Variables in Python can be used in expressions just like literals. For example:
z = x + 2
print(y + " world")
In this example, z is a variable that holds the value of x plus 2, and the print() function outputs the value of y followed by the string ” world”.
Variables in Python can be reassigned to a new value at any time:
x = 10
y = "goodbye"
In this example, x is reassigned to a new value of 10, and y is reassigned to a new string value of “goodbye”.