Type this line of code into the interactions area and hit "Enter":

triangle​(​50, "solid", "red"​)

1

What is the name of this function?

2

What did the expression evaluate to?

3

How many arguments does triangle expect?

4

What data type does the triangle function produce?
(Numbers? Strings? Booleans?)

Catching Bugs

The following lines of code are all BUGGY! Read the code and the error messages to identify the mistake.

5 triangle(20, "solid" "red")

Pyret didn’t understand your program around

triangle(20, "solid" "red")

Can you spot the mistake?

6 triangle(20, "solid")

This application expression errored:

triangle(20, "solid")

2 arguments were passed to the operator. The operator evaluated to a function accepting 3 parameters. An application expression expects the number of parameters and arguments to be the same.

Can you spot the mistake?

7 triangle(20, 10, "solid", "red")

This application expression errored:

triangle(20, 10, "solid", "red")`

4 arguments were passed to the operator. The operator evaluated to a function accepting 3 parameters. An application expression expects the number of parameters and arguments to be the same.

Can you spot the mistake?

8 triangle (20, "solid", "red")

Pyret thinks this code is probably a function call:

triangle (20, "solid", "red")

Function calls must not have space between the function expression and the arguments.

Can you spot the mistake?

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