What are Variables?
Variables are used to store data. This data can then be used throughout your code. Below is an example of how to create a variable in Python:
# Example of a variable in Python
age = 28- age is the variable name, also known as the variable identifier.
- 28 is the value assigned to the variable.
- The = (equals sign) is needed to assign the value to the variable.
So now we have created a variable age and assigned a value 28.
You can now use this variable in your code by simply referring to its name.
# Using the variable
print(age) # This will print the variable value **28** to the consoleConstants
Constants in programming are variables that are meant to remain unchanged throughout the program. Their value is constant.
Unlike other programming languages, Python does not have a built-in way to create constants. Meaning that constants in Python can technically be changed after you initially assign their value.
However, it is common to use uppercase letters to indicate that a variable should be treated as a constant and its value should not be changed later
# Example of a constant in Python
PI = 3.14159In this example, PI is intended to be a constant that represents the mathematical constant pi.
Next we’ll go over the different types of variables in Python.