# Serial and binary search in data structure using c pdf

A binary search is when you start with the middle of a sorted list, and see whether that's greater than or less than the value you're looking for, which determines whether the value is in the first or second half of the list. It eliminates half the data at each iteration. Compare list[12] 'M' with 'U':

The dictionary analogy seems fine to me, though it's a better match for interpolation search. A binary search starts in the middle of a sorted array, and determines which side if any the value you are looking for is on. This is pretty much how humans typically look up a word in a dictionary although serial and binary search in data structure using c pdf use better heuristics, obviously - if you're looking for "cat" you don't start off at "M". A binary search, on the other hand, is when you open the book usually in the middlelook at the name on top of the page, and decide if the name you're looking for is bigger or smaller than the one you're looking for. May 4 '09 at

Or if there is no value in the array finishes the search. A binary search is when you start with the middle of a sorted list, and see whether that's greater than or less than the value you're looking for, which determines whether the value is in the first or second half of the list. A binary search comes with the prerequisite that the data must be sorted. O n Example Python Code:

A binary search comes with the prerequisite that the data must be sorted. Apr 4 '14 at So you should never sort data just to perform a single binary search later on.

Bill the Lizard k If it is smaller, it gets the left side of the array and finds the middle element of that part. Jon Skeet k Pick a random name "Lastname, Firstname" and look it up in your phonebook.

A linear search looks down a list, one item at a time, without jumping. Binary Search finds the middle element of the array. Its easy but work needed is in proportion to the amount of data to be searched.

Think of it as two different ways of finding your way in a phonebook. We can leverage this information to decrease the number of items we need to look at to find our target. But for binary search the values must be in sorted order.

Smaller, look further on. Jon Skeet k Binary Search finds the middle element of the array.