find the square root of a number in swift

You can find the square root of a number in Swift by using the built-in square root function, which is part of the Foundation framework. Here's an example:

main.swift
import Foundation

let number = 16.0
let squareRoot = sqrt(number)

print("The square root of \(number) is \(squareRoot)") // Output: The square root of 16.0 is 4.0
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In this example, we first import the Foundation framework, which contains the square root function. We then declare a constant number with the value 16.0, and call the sqrt function with number as its argument to calculate the square root. Finally, we print the result using string interpolation.

Note that the sqrt function returns a Double, so make sure to assign its result to a variable or constant of type Double.