round a number to the nearest integer in swift

In Swift, you can round a number to the nearest integer using several methods.

1. round(): This function rounds a number to the nearest integer using the standard rounding rules. For example:

main.swift
let x = 3.6
let rounded = round(x) // 4.0
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2. ceil(): This function rounds a number towards positive infinity. For example:

main.swift
let x = 3.2
let roundedUp = ceil(x) // 4.0
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3. floor(): This function rounds a number towards negative infinity. For example:

main.swift
let x = 3.8
let roundedDown = floor(x) // 3.0
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It is important to note that round(), ceil(), and floor() all return a Double value. If you want the result as an Int, you can simply cast it as follows:

main.swift
let x = 3.6
let rounded = Int(round(x)) // 4
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