Sequential Search.

This algorithm checks whether the number ‘v’ is contained in a set of numbers already stored in the data a[0], a[1], …, a[r-1] of the array ‘a’ (where ‘r’ the number of elements in it), comparing it sequentially with all numbers, starting from the beginning. If the check reaches the end without finding the number, the value -1 is returned. Otherwise, we are returned the index of the position of the one-dimensional array containing the number.

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