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IF -ELSE Statements

It helps to think of the three of them like this:

  • An If statement gives the computer one option: if  is True, then do something. That’s all.
  • An If-Else statement gives the computer two options: if  is True, then do something. If  if False, do some other thing!
  • An If-Elif-Else statement gives the computer several options, where you can say “Check all of these conditions until you find one that’s True.”

 

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Each kind of statement is indented in the same way - with 4 spaces. Here’s an example of each:

If Statement:

if x == 5:
        print("x is 5!")

If-Else Statement:

if x == "Penny":
        print("Your name is Penny!")
else:
        print("Looks like your name isn't Penny!")

If-Elif-Else Statement:

if age == 50:
        print("You're really old!")
elif age == 20:
        print("You're kind of young!")
elif age == 10:
        print("You're a kid!")
else:
        print("I wonder how old you are?")

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