Using Int.parse () to determine leap year code implementation

During this week's study, we talked about a common problem in class, "Leap year Problem", which is easier to implement in code, but in the process of programming we tend to use the default user to enter numbers, forgetting to consider cases where the input is empty or other English letters or special letters.

So we can relax the input data into a string type and use the Int.parse () function to Convert the string representation of a number to its equivalent signed integer.

Here are the specific uses of the int32.parse that I have queried on the Web:

Here's the code I wrote and the results show:

Using Int.parse () to determine leap year code implementation