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Motivation

Explore the motivation behind using arrays in Java by examining a practical example involving averages and deviations. Understand how arrays help efficiently store multiple values, enabling computation beyond simple sums, and why they are more practical than using many individual variables or re-entering data.

Scenario: Calculating deviations from an average

Imagine a grade-school class during an arithmetic lesson. The teacher has planned an exercise using a calculator. She will announce ten numbers, and each student is to find the numbers’ sum. After that, she has some other calculations planned.

The twins, ...