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
if 3 > 0:
print('3 is more than 1')
print('3 is a positive number')
If-Else
number = 9
if number < 0:
print('It is a positive number')
else:
print('It is a negative number')
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`.
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?')
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
If Condition and And Logical Operator
if raining and dog_is_napping:
skip_playing_ball
If and Or Logical Operator
if you_have_a_dog or you_have_a_cat:
play_with_your_pet
Series based on
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