Make sure you’ve loaded code.pyret.org (CPO), clicked “Run”, and are working in the Interactions Area on the right. Hit Enter/return to evaluate expressions you test out.
Strings
String values are always in quotes.
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Try typing your name (in quotes!).
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Try typing a sentence like "I’m excited to learn to code!" (in quotes!).
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Try typing your name with the opening quote, but without the closing quote. Read the error message!
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Now try typing your name without any quotes. Read the error message!
1 Explain what you understand about how strings work in this programming language.
Numbers
2 Try typing 42 into the Interactions Area and hitting “Enter”. Is 42 the same as "42" ? Why or why not?
3 What is the largest number the editor can handle?
4 Try typing 0.5. Then try typing .5. Then try clicking on the answer. Experiment with other decimals.
Explain what you understand about how decimals work in this programming language.
5 What happens if you try a fraction like 1/3?
6 Try writing negative integers, fractions and decimals. What do you learn?
Operators
7 Just like math, Pyret has operators like +, -, * and /.
Try typing in 4 + 2 and then 4+2 (without the spaces). What can you conclude from this?
8 Type in the following expressions, one at a time: 4 + 2 * 6 (4 + 2) * 6 4 + (2 * 6) What do you notice?
9 Try typing in 4 + "cat", and then "dog" + "cat". What can you conclude from this?
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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