The Beginner’s Guide to Python Variables
Variables in any programming language are like a small temporary container. which is used to store the data for temporary purposes in a ram.
Let’s see how to declare a variable in python and what other things we can do with python variables.
Python has no rule or command for declaring or defining a variable.
A variable creates a space inside RAM when the first value is get initialized to it.
x = 400 # x is of type intx = “Wakeupcoders” # x is now of type strprint(x)
Python Rules for Naming a Variable:
In a python, we can declare a variable like a, b, or c or it's always better to give some meaningful and descriptive name like car, book, or age as per the requirement.
Let’s see some of the rules of declaring variables.
* Variable should always start with an alphabet letter or we can also use underscore.
* We can not initialize with the number.
* Variable names are always case sensitive.
* Variable should contain alphanumeric characters, numbers and underscores.
How to Handle Multi-Words Variable Names
In a multi-word variable, it could be difficult to read. Let’s see how we can make it more convenient to read.
myVariableName = “Wakeupcoders”
MyVariableName = “Wakeupcoders”
my_variable_name = “Wakeupcoders”
How to Handle Assigning Multiple Values to Variables
We can assign multiple values to variables.
Assign Many Values to Multiple Variables
x, y, z = “Wakeupcoders 1”, “Wakeupcoders 2”, “Wakeupcoders 3”print(x)print(y)print(z)
Assigning One Value to Multiple Variables
x = y = z = “Wakeupcoders”print(x)print(y)print(z)
Unpacking a Collection
fruits = [“apple”, “banana”, “cherry”]x, y, z = fruitsprint(x)print(y)print(z)
How to Use Global Variables in Python?
Global variables are always declared outside of a function and they can be accessed both, inside and outside of the function.
x = “Wakeupcoders”def myfunction():print(“Python by “ + x)myfunction()
When you create a variable with the same name inside a function, it becomes local and can only be used within the function. The global variable with the same name will remain global and have the same value as before.
x = “awesome”def myfunc():x = “Wakeupcoders”print(“Python by “ + x)myfunc()print(“Python is “ + x)
Global Keywords in Python
When you create a variable within a function, it is usually local and can only be used within that function.
The global keyword can be used to create a global variable within a function.
def myfunction():global xx = “Wakeupcoders”myfunc()print(“Python by “ + x)
End of Blog
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