Please be aware that it's not the row of the diamond but the diagonal length. Thank You !

Write a program to print a diamond with a specified size using asterisks (). The program receives an odd positive integer as the diagonal length of the diamond, which represents the number of asterisks () in the middle row. As diamonds are symmetric, the number of asterisks () in rows from top to bottom should be 1,3,5...5,3,1. Expected output is as follows: Expected Outcomes: NOTE: The input is required to be odd positive integers. Validity check should be provided