A possible CodeRunner question of the type "Fill in the gaps" could be the following.

You are obliged to fill in the gaps within the given code.

The gaps are marked by $???$ and commented with # task $1$ and # task $2.$

The function calc$($num$)$ should test if a given positive number num is a prime number or not.

Accordingly, the output should be "num is a prime number" or "num is not a prime number".

Your code is automatically checked with several test cases. Two of them are listed here with the expected result.

For example:

Test Result

calc$(3)$

$3$ is a prime number

calc$(6)$

$6$ is not a prime number