table of contents installing python downloading and installing python starting idle how to use this book finding help online the interactive shell some simple math stuff evaluating expressions storing values in variables writing programs strings string concatenation writing programs in idle' file editor hello world saving your program opening the programs you've saved how the "hello worldprogram works variable names guess the number sample run of guess the number source code of guess the number import statements the random randint(function loops blocks the boolean data type post questions to