The "binary search algorithm" is one of the quickest way for searching threw an array, the "linear search algorithm" makes "n" comparaisons for searching for an element inside a given array. The "binary search algorithm" only makes log2(n) comparaisons for searching that same element,so the "binary search algorithm" is definitly much more quicker than the usual "linear search algorithm" but in order to search threw an array,you need to sort the elements first one of the algorithm available for sorting arrays is the "bubble sort algorithm"