LESSON 83 OF 349 · CONDITIONAL STATEMENTS - CHALLENGES

Find the absolute difference in Swift

Practice

The absolute difference is a measure of the difference between two numbers but expressed as a positive number.

In other words, it’s taking the difference between two values (x - y) and then calculating the absolute value of the result.

Create a function that takes in two numbers a and b and returns their absolute difference.

Examples:

absDiff(3, 0) ➞ 3

absDiff(0, 3) ➞ 3

absDiff(10, -1) ➞ 11

absDiff(-5, -7) ➞ 2

absDiff(6, -6) ➞ 12

absDiff(1.5, 1.5) ➞ 0

Note:

Do not use the abs() function provided by Swift (it will defeat the purpose of the challenge)

Hints:

If a is less then b, the absolute difference equals b - a. What if a is greater than or equal to b?

If a < b, we should return b - a. Otherwise, we should return a - b. We can use an if statement to put this in code.

STEP 1 OF 3

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Recreating Absolute Difference in Swift