What is the purpose of the 'ordinal()' method in the StudentResult enum?

The ordinal() method in an enum returns the zero-based index of the enum constant in the order they are declared. For example, in the StudentResult enum:

public enum StudentResult {
    PASS,   // ordinal 0
    FAIL,   // ordinal 1
    ABSENT  // ordinal 2
}

• StudentResult.PASS.ordinal() would return 0
• StudentResult.FAIL.ordinal() would return 1
• StudentResult.ABSENT.ordinal() would return 2

This method is useful when you need to determine the position of an enum constant within its declaration order.