DAY 20 OF 90 · Collect and total

Spread of the list

Easy90 Days of Looping

Inputs

values is a list of 1 to 12 whole numbers, each from -50 to 50.

Your tasks

Create low and high and set both to the first number in values.
Use one loop over values that updates low when it sees something smaller and high when it sees something larger.
Work out high - low.
Complete spread so it returns high - low. Return it, do not print it.

Example

With values = [4, 11, -3, 8], spread returns 14.

Rules

Use a single loop, not one loop for each.

Test data

TEST DATA 1: values is [4, 11, -3, 8]

TEST DATA 2: values is [5]

Practice focus

One pass over a list to add, count, find the biggest and the smallest. Scanning an array once and keeping a running answer is the backbone of linear-time solutions.

Day 19 Day 21 All 90 days