Boolean-producing expressions are yes-or-no questions, and will always evaluate to either true (“yes”) or false (“no”).
What will the expressions below evaluate to? Write down your prediction, then type the code into the Interactions Area to see what it returns.

Prediction Result Prediction Result

1 (<= 3 4)

2 (string>? "a" "b")

3 (= 3 2)

4 (string<? "a" "b")

5 (< 2 4)

6 (string=? "a" "b")

7 (>= 5 5)

8 (string<>? "a" "a")

9 (>= 4 6)

10 (string>=? "a" "a")

11 (<> 3 3)

12 (string<>? "a" "b")

13 (<> 4 3)

14 (string>=? "a" "b")

15 In your own words, describe what < does.

16 In your own words, describe what >= does.

17 In your own words, describe what <> does.

Prediction: Result:

18 (string=? "a tree" "trees")

19 (string=? "tree" "tree")

20 (string-contains? "catnap" "cat")

21 (string-contains? "cat" "catnap")

22 In your own words, describe what string-contains does. Can you generate another expression using string-contains that returns true?

★ There are infinite string values ("a", "aa", "aaa"…​) and infinite number values out there (…​-2,-1,0,-1,2…​ ). But how many different Boolean values are there?

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