variables are containers that can hold any data so you can use them
to store numerical data tax data etc. You can also put tax data into it
so for example you are spending two hundred and two dollar and five
cents on gas and you're spending some money on groceries so we
just created variable to store all these individual expenses. You can
not use special characters in it for example if I create a variable like
this then also it won't work because I have a plus sign here. will get
this error to get a complete list of Python keywords you can just
google it and you'll get a list.