Python Tutorial - 2. Variables

Key Takeaways

hello today's topic is variables in Python now what are variables variables are containers that can hold any data so you can use them to store numeric data tax data Etc so let's say you want to track down your monthly expenses in Python programming language what you need to do first to solve this problem is store individual expenses in some place and then use that place to do a sum of all those individ individual expenses to come up with your total expense so we'll go ahead and create variable to store all these individual expenses so for example let's on rent you are spending $220 so what we just did here is we created this varable called rant and we placed value 1220 into it so using assignment operator you can put a value inside a variable so the left on the left hand side of the assignment operator is a variable name and right hand side is the value similarly you can create variables for other items for example you're spending $22 and5 on gas and you're spending some money on groceries so we just created three variables now if you print their value you can print it like this so by using this statement you what you're doing is you are accessing this variable called rant and you are printing the value in it okay now to calculate the total monthly expenses all you do is just add those three things and this is the syntax on how to do it in Python so you created a fourth variable called total and you added all these three individual values in it so if you print total you will get this okay now variables are called VAR Ables because the value in it can vary so for example now let's say instead your rent went up and it become $1,400 so you can use the same variable and assign a different value so again the container is same is just that you now remove the previous value and you put the new value in it okay uh you can also uh put tax data into it so for example uh now I want to store the name of those individual grou U expense items so you can create a variable called item and put the name item my item two was gas and my item three was groceries so this way now you can just print all those items so you can say my expense items were these so you see like when you do this it is printing the value inside these three variables now there are certain rules on variable naming conventions so for example you cannot use certain python keywords like the the predefined keywords as variable name for example true is a keyword in Python what I mean by that that is it has a specific meaning in Python so you cannot use it as a variable name so if you try to do that you'll get this error to get a complete list of python keywords you can just Google it and you'll get a list so don't use that list as variable names other than that you cannot use faal 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 okay so that was all about variable thanks for watching