What is the mid index formula used in binary search?
Practice Questions
Q1
What is the mid index formula used in binary search?
(low + high) / 2
(high - low) / 2
(low + high) / 2 + 1
(low + high) / 2 - 1
Questions & Step-by-Step Solutions
What is the mid index formula used in binary search?
Step 1: Understand that binary search is used to find an item in a sorted list.
Step 2: Identify the two pointers: 'low' (the starting index) and 'high' (the ending index) of the list.
Step 3: To find the middle index, use the formula (low + high) / 2.
Step 4: Make sure to use integer division if you are working with whole numbers, so the result is an integer.
Step 5: Use this mid index to check if the item you are searching for is at this index, or if you need to search in the left or right half of the list.
