DAY 54 OF 90 · Loops inside loops

Closest pair

Medium90 Days of Looping

Inputs

values is a list of 2 to 12 whole numbers, each from -50 to 50.

Your tasks

Set best to the gap between the first two numbers (ignore the sign).
Use nested loops to try every pair of positions i < j. If the gap between values[i] and values[j] is smaller than best, replace best.
Complete closestGap so it returns best. Return it, do not print it.

Example

With values = [10, 4, 21, 6], closestGap returns 2.

Rules

The gap is never negative.
values always has at least 2 numbers.

Test data

TEST DATA 1: values is [10, 4, 21, 6]

TEST DATA 2: values is [3, 3]

Practice focus

Nested loops compare every pair and build rows. The slow, simple answer to most problems is two loops. Knowing it is what lets you see how to beat it.

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