If tests: True and False values.
If tests: True and False values.

BadWizard/intro_programming,chenleo/ipynotebook,chenleo/ipynotebook,BadWizard/intro_programming,BadWizard/intro_programming,nntisapeh/intro_programming,nntisapeh/intro_programming,nntisapeh/intro_programming,chenleo/ipynotebook,ehmatthes/intro_programming,ehmatthes/intro_programming,nntisapeh/intro_programming,ehmatthes/intro_programming,chenleo/ipynotebook,BadWizard/intro_programming,ehmatthes/intro_programming