15.5. Chapter 15 - Concept Summary

Chapter 15 included the following concepts from computing.

15.5.1. 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.

  • Elif - The keyword elif is used when you want to have a conditional with 3 or more possibile options. Add as many elif statements as you need after an if and before a else.

  • 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.


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