boolean expressions exercise - conditional tests exercise - more conditional tests if statements simple if statements if-else statements the if-elif-else chain using multiple elif blocks omitting the else block testing multiple conditions exercise - alien colors # exercise - alien colors # exercise - alien colors # exercise - stages of life exercise - favorite fruit using if statements with lists checking for special items checking that list is not empty using multiple lists exercise - hello admin exercise - no users exercise - checking usernames exercise - ordinal numbers styling your if statements exercise - styling if statements exercise - your ideas summary dictionaries simple dictionary working with dictionaries accessing values in dictionary adding new key-value pairs starting with an empty dictionary modifying values in dictionary removing key-value pairs dictionary of similar objects exercise - person exercise - favorite numbers exercise - glossary looping through dictionary looping through all key-value pairs looping through all the keys in dictionary looping through dictionary' keys in order looping through all values in dictionary exercise - glossary exercise - rivers exercise - polling nesting list of dictionaries list in dictionary xiv contents in detail