Python Variables

Variables in Python are used to store data values. Unlike other programming languages, Python does not require declaring the type of a variable. The type of a variable is determined by the value assigned to it.

Variable Declaration

In Python, you can declare a variable and assign a value to it in a single line. For example:

x = 5
y = "Hello, Python!"
print(x)
print(y)

Variable Naming Rules

• Variable names can contain letters, numbers, and underscores.
• Variable names must start with a letter or underscore.
• Variable names are case-sensitive.
• Variable names cannot be reserved keywords (e.g., if, for, or while).

Variable Reassignment

You can change the value of a variable by reassigning it. For example:

x = 5
x = x + 1
print(x)

Conclusion

Understanding how to use variables is essential for writing Python programs. Variables allow you to store and manipulate data, making your programs more dynamic and flexible.