Final Answer:
The function `more20` returns true if the given non-negative number is 1 or 2 more than a multiple of 20, and false otherwise. For example, `more20(20)` returns false, `more20(21)` returns true, and `more20(22)` returns true.
Step-by-step explanation:
The function `more20` checks whether the given non-negative number is 1 or 2 more than a multiple of 20. It does so by using the modulo operator `%`, which returns the remainder when the number is divided by 20. If the remainder is 1 or 2, the function returns true, indicating that the number is 1 or 2 more than a multiple of 20. Otherwise, it returns false.
For instance, when `more20(20)` is called, the result is false because 20 is a multiple of 20, and there is no remainder. When `more20(21)` is called, the result is true because 21 is one more than a multiple of 20. Similarly, `more20(22)` returns true since 22 is two more than a multiple of 20.
This function is useful for scenarios where the task involves checking the relationship between a non-negative number and multiples of 20, providing a clear and concise way to express such conditions in code.