How can the firstWhere method be modified to include the orElse function?

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To include the orElse function in the firstWhere method, we need to add it as an optional parameter. Here's an example:

List<int> nums = [1, 2, 3, 4, 5];

int foundNum = nums.firstWhere((num) => num > 3, orElse: () => -1);
print(foundNum); // Output: 4

In the above example, we added the orElse function as an optional parameter in the firstWhere method. This function will be executed if no match is found in the list. In this example, since we are searching for a number greater than 3, the first match is 4. If no match was found, the orElse function would have returned -1 (as specified in the function).