Lesson 10 · Python Functions — Knowledge ChecksAnswer key

Which keyword defines a function in Python?

1. A.function
2. B.def✓
3. C.define
4. D.func

Python uses def, followed by the function name, parentheses, and a colon.

Given def square(side_length):, what does calling square(45) make the robot do?

1. A.Draw a square with 45 cm sides✓
2. B.Draw a square with 90 cm sides
3. C.Turn 45 degrees
4. D.Cause an error — you must pass two numbers

The argument 45 fills the side_length parameter, so each Straight drives 45 cm. One parameter, one argument.

A variable created inside a function (like angle above) can be used…

1. A.Anywhere in the program
2. B.Only inside that function — it is local✓
3. C.Only after the program ends
4. D.Only in other functions

Variables defined in a function are local to it. Code outside can't see angle — which keeps functions self-contained and safe.

What's wrong with this? def multiply(x, y)

1. A.multiply should be capitalized
2. B.It is missing the colon: def multiply(x, y):✓
3. C.x and y need quotes
4. D.Nothing is wrong

A def line, like a for line, must end with a colon before its indented body.