Learn Python 3 the Hard Way: A Very Simple Introduction to the Terrifyingly Beautiful World of Computers and Code

Exercise 5. More Variables and Printing

Now we’ll do even more typing of variables and printing them out. This time we’ll use something called a format string. Every time you put " (double-quotes) around a piece of text you have been making a string. A string is how you make something that your program might give to a human. You print strings, save strings to files, send strings to web servers, among many other things.

Strings are really handy, so in this exercise you will learn how to make strings that have variables embedded in them. You embed variables inside a string by using a special {} sequence and then put the variable you want inside the {} characters. You also must start the string with the letter f for “format,” as in f"Hello {somevar}" ...