61 lines
1.2 KiB
Markdown
61 lines
1.2 KiB
Markdown
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Conditions
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The 'is' operator
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Unlike the double equals operator "==", the "is" operator does not match the values of the variables, but the instances themselves
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x = [1,2,3]
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y = [1,2,3]
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print(x == y) # Prints out True
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print(x is y) # Prints out False
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The "in" operator
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The "in" operator could be used to check if a specified object exists within an iterable object container, such as a list:
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name = "John"
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if name in ["John", "Rick"]:
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print("Your name is either John or Rick.")
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Boolean operators
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The "and" and "or" boolean operators allow building complex boolean expressions, for example:
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name = "John"
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age = 23
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if name == "John" and age == 23:
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print("Your name is John, and you are also 23 years old.")
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if name == "John" or name == "Rick":
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print("Your name is either John or Rick.")
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Exercise
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Change the variables in the first section, so that each if statement resolves as True.
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# change this code
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number = 10
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second_number = 10
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first_array = []
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second_array = [1,2,3]
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if number > 15:
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print("1")
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if first_array:
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print("2")
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if len(second_array) == 2:
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print("3")
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if len(first_array) + len(second_array) == 5:
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print("4")
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if first_array and first_array[0] == 1:
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print("5")
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if not second_number:
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print("6")
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