Arrays

An array stores many related values under one name, accessed by an index. Loops process arrays to search, total, count and sort.

• Declare with bounds: `var marks : array[1..30] of integer;` — index 1..30.
• A `for` loop visits every element: `for i := 1 to 30 do total := total + marks[i];`.
• Common algorithms: running total/average, find max/min, linear search with a found-flag, count matches.
• Parallel arrays (names[] and marks[]) store related data at the same index — always process them together.

• Array — an indexed collection of values of the same type.
• Index — the position number used to access an array element.
• Parallel arrays — separate arrays whose matching indices belong together.