The algorithm InsertionSort(int[] A) starts the for loop from j = _____ to A.length.
Understand the Problem
The question is asking for the starting index of the 'for' loop in the Insertion Sort algorithm within the context of its implementation in code.
Answer
2
The final answer is 2.
Answer for screen readers
The final answer is 2.
More Information
The insertion sort algorithm starts its outer loop from the second element of the array when the array is 1-indexed, meaning it uses index 2 as the starting point. This is because the first element is considered as already sorted in the initial step.
Tips
A common mistake is starting the loop from index 1 in a 1-indexed array; however, it should start from index 2. Also, do not confuse with zero-indexed conventions where the loop starts from 1.
Sources
- for loop in insertion sort - algorithm - Stack Overflow - stackoverflow.com
- Loop invariant for Insertion Sort's inner while loop. : r/algorithms - reddit.com
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