PYTHON BEGINNER'S GUIDE | VARIABLES IN PYTHON

What is a Variable?

A variable is like a container that can store a value in it. For example: x=2. Here, ‘x’ is the variable(or the container) which stores the value ‘2’. Now if you print ‘x’ using the command ‘print(x)’, the output will be 2.

Using multiple Variables:

You can also use multiple variables to store multiple values. For example:

x=2

y=3

Now, print the values of ‘x’ and ‘y’ by typing the following commands:

print(x)

print(y)

And run the program. The output will be :

2

3

 

 Variables are called so because YOU CAN CHANGE THE VALUES STORED IN THEM ANYTIME AND ANYWHERE IN THE PROGRAM. For example,

x=2

x=3

Now, what do you think the output would be when you print ‘x’??

 

 

It will be ‘3’

It is because ‘3’ is the newest value you assigned to the variable ‘x’ and now the value ‘2’ is completely lost and the new value of ‘x’ is ‘3’.

Adding Variables:

Adding variable means adding the values stored in them using the ‘+’ operator.(I will tell you what an operator is and what are the different types of operators in later posts, so stay tuned)

For example,

Here we added ‘x’ and ’y’ which had the value ‘2’ and ‘3’ respectively and got the result ‘5’.

We can also increment the values in the variables in the following ways:

OR

Now we have incremented the value of ‘x’ by ‘10’.

Multiplying Variable:

Similarly, we can also multiply two or more variables using the ‘*’ operator.

For example,

Here we multiplied the values stored in variables ‘x’ and ‘y’. And got the result ‘6’.

Just like in addition, we can also multiply variables with numbers thus increasing their value just like in this example:

OR

Here we multiplied the value of ‘x’ by ‘5’ and changed the value of ‘x’ to ‘10’.

String variables:

Just like in the above examples where we had integers as values stored in variables, we can also have Strings as values stored in variables. For example:

 

CONGRATULATIONS!!!! You now have a basic idea about variables in Python. We will discuss on how to use these variables on a higher level in later posts, so stay tuned!!

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