Answer:
public int RandNum();
* Assuming it returns an integer
Step-by-step explanation:
I believe you mean to write the function header of randNum.
To write the header of the function, we need to specify its return type, name, parenthesis and parameters inside the parenthesis - if exist.
If it returns an integer it should have int, if it returns a double it should have double in the header. In the answer, I assumed it returns an integer.
The name is already given, RandNum
Since, the function does not take any parameter, inside of the parenthesis will be empty.