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Binary Search is the most famous and simplest Searching Algorithm that searches the given list for a target element. But the only condition is that the given list should be sorted, only then you can use Binary Search for searching.
Binary search compares the search element to the middle element of the list. If the search element is greater than the middle element, then the left half or elements before the middle elements of the list is eliminated from the search space, and the search continues in the remaining right half. Else if the search element is less than the middle value, the right half elements or all the elements after the middle element is eliminated from the search space, and the search continues in the left half. This process is repeated until the middle element is equal to the search element, or if the algorithm finds that the searched element is not in the given list at all.
Step 4: Repeat until low>=high should be: Repeat until low<=high