9.5. String Comparison

The comparison operators also work on strings. To see if two strings are equal you simply write a boolean expression using the equality operator.

 
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word: str
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word = "banana"
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if word == "banana":
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    print("Yes, we have bananas!")
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else:
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    print("Yes, we have NO bananas!")
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​

(ch08_comp1)

Other comparison operations are useful for putting words in lexicographical order. This is similar to the alphabetical order you would use with a dictionary, except that all the uppercase letters come before all the lowercase letters.

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word: str
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word = "zebra"
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​
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if word < "banana":
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    print("Your word, " + word + ", comes before banana.")
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elif word > "banana":
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    print("Your word, " + word + ", comes after banana.")
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else:
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    print("Yes, we have no bananas!")
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​

(ch08_comp2)

It is probably clear to you that the word apple would be less than (come before) the word banana. After all, a is before b in the alphabet. But what if we consider the words apple and Apple? Are they the same?

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print(str("apple" < "banana"))
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​
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print(str("apple" == "Apple"))
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print(str("apple" < "Apple"))
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​

(chp08_ord1)

Check your understanding

strings-8-1: Evaluate the following comparison:

"Dog" < "Doghouse"



strings-8-2: Evaluate the following comparison:

"dog" < "Dog"




strings-8-3: Evaluate the following comparison:

"dog" < "Doghouse"



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