Swift version: 5.1
The easiest way to find the maximum of three numbers is to use the
max() function twice: once with your first two numbers, and again with your third number and the result of the first call. Here's an example:
let first = 10 let second = 15 let third = 18 let largest = max(max(first, second), third)
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Available from iOS 2.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.