Functional way to check if array of numbers is sequential

Question

Let\'s say that an array is sequential when each successful element has the value of previous element + 1. Suppose I have an array of numbers like {5,6,7,

Answer 1

Try this one:

    bool IsSequential(int[] array)
    {
        return array.Zip(array.Skip(1), (a, b) => (a + 1) == b).All(x => x);
    }