Chapter 12 - Summary

Chapter 12 included the following concepts from computing.

Summary of Python Keywords and Functions

  • And - The keyword and is used to join two logical expressions and then both of the logical expressions must be true for the joined expression to be true.
  • Else - The keyword else is used to execute one or more statements in a block following the else when the condition in the if part of the statement is false. An else must always have an if statement before it.
  • If - The Python keyword if is used to start a condition. It is followed by a Boolean expression and then has one or more statements in the body of the loop that are executed only if the Boolean expression is true.
  • Not - The keyword not is used to negate a logical expression. If the original expression is true the negated expression is false and if the original expression is false the negated expression is true.


This is the end of chapter 12. We would love it if you could give us some feedback on this chapter at You might want to open this link in a new tab to make it easier for you to return to your place in this ebook.

Next Section - Chapter 12 Exercises