Arrays and Iteration

Find Maximum

Scan the array once, keeping the largest value seen so far. The replay highlights when a candidate replaces the running maximum.

Algorithm

Basic Implementation

basic.scala 
object Main {
	def main(args: Array[String]): Unit = {
		val arr = Array(3, 1, 4, 1, 5, 9, 2, 6)
		var best = arr(0)
		for (i <- 1 until arr.length) {
			if (arr(i) > best) {
				best = arr(i)
			}
		}
		println(best)
	}
}

Complexity

  • Time: O(n)
  • Space: O(1)

Implementation notes

  • Keep the explicit control flow. Library shortcuts would hide the state changes this lesson is meant to replay.
  • The final output is intentionally small and deterministic for cross-language comparison.
execution replay The checked-in replay follows the language-neutral state table for `array-find-max`.
cross-language comparison This Scala DSA version keeps the same data and final output as every other DSA book in this wave.