Lesson 4 · Parameters & Customization — Knowledge ChecksAnswer key

You click the gear on a function block and drag an 'input name' block into the 'inputs' block. What happens to the function definition?

1. A.Nothing until you press Run
2. B.It grows a "with:" row naming the new parameter✓
3. C.The blocks inside the function are deleted
4. D.A new function is created

The definition block changes shape as soon as the input connects — that 'with:' row is the parameter list. Renaming the input renames what appears there.

Inside the function body, where do you get a block that holds the parameter's value?

1. A.The Variables category — the parameter appears there as a rounded block✓
2. B.The Functions category, next to the call block
3. C.You type its name into the number slot
4. D.You have to make a new variable with the same name

Adding a parameter creates a variable of the same name, and Blockly lists it under Variables. Drag that block into any slot inside the function where you want the value.

In the call square (side_length: 50), what is the 50?

1. A.The parameter
2. B.The argument — the value passed in✓
3. C.The function name
4. D.The turn angle

The parameter is the name (side_length) in the definition; the argument is the value (50) you pass when calling.

With square (side_length), calling square (side_length: 35) makes the robot drive each side how long?

1. A.90 cm
2. B.35 cm✓
3. C.4 cm
4. D.It depends on the effort

The argument 35 flows into the side_length parameter, so every Straight drives 35 cm.

A function is defined as draw rectangle (length, width). Are draw rectangle (50, 30) and draw rectangle (30, 50) the same?

1. A.Yes — the numbers are the same
2. B.No — order matters, so length and width are swapped✓
3. C.Yes — Blockly sorts them
4. D.Only if the robot is turned off

Arguments fill parameters in order. (50, 30) means length 50 / width 30; (30, 50) swaps them into a different rectangle.