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Vicki Langer
Vicki Langer

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Charming the Python: Conditionals

#python #beginners

If coding tutorials with math examples are the bane of your existence, keep reading. This series uses relatable examples like dogs and cats.

Conditionals

If 

if condition: thisstuffwillhappen
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if 3 > 0: print('3 is more than 1') print('3 is a positive number')
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If-Else 

number = 9 if number < 0: print('It is a positive number') else: print('It is a negative number')
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If Elif Else

Elif allows you to run decisions through multiple levels of logic.

In our example, we want to play_ball_with_dog. Then we base our playing with the dog on the weather and other parameters.

Once a condition is fulfilled, the process stops. Forexample, if it's not nice_outside, we move on to decide if dog_is_napping. If dog_is_napping, we spot going through the decision process and skip_playing_ball. If dog is not napping, we move forward to see if it is raining. If it is raining we take_dog_to_indoor_dog_park. If it is not raining we move on to our last statement and choose to play_with_dog_inside

if nice_outside: play_ball_with_dog # if condition isn’t met, stop here and `play_ball_with_dog`. If not, keep going elif raining: take_dog_to_indoor_dog_park # if condition isn’t met, stop here and `take_dog_to_indoor_dog_park`. If not, keep going else: play_with_dog_inside # if no other condition is met, end here and `play_with_dog_inside`.
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If numbers are more your thing, heres an example with grades.

if 90 > 100: print('Congrats, you got an A') elif 80 < 89: print('Nice, you got a B') elif 70 < 79: print('Okay, you got a C. What are you having trouble with?') elif 65 < 69: print('Um, you got a D. What can I explain differently?') else: print('Hmm, you got an F. Would a different environment be helpful?')
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Nested Conditions

Nesting jst means some code inside of other code. In this example, we first decide if you_have_a_dog. If you don't, we decide if you_have_a_cat. If you don't we decide if maybe_you_have_no_pet. However, if you_have_a_dog, we would've stopped and processed the nested code and decided if it's nice_outside and so on.

if you_have_a_dog: play_with_dog if nice_outside: play_ball_with_dog elif raining: take_dog_to_dog_park else: play_with_dog_inside elif you_have_a_cat: play_with_cat else maybe_you_have_no_pet: no_play_with_dog_or_cat
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If Condition and And Logical Operator 

if raining and dog_is_napping: skip_playing_ball
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If and Or Logical Operator 

if you_have_a_dog or you_have_a_cat: play_with_your_pet
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Series based on

asabeneh

30 Days Of Python Challenge

Asabeneh ・ Nov 20 '19

#python #javascript #react #mongodb

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