Python has a number of built-in functions that perform some type of operation on the arguments you provide, and output a piece of new data. This new data can be saved in a variable for use in your program.
type() tells us if the data is a Boolean, str, int, or float:
We already learned about str(), int(), and float().
We can find the number of characters in a string or number of items in a set of data using the len() function.