find the area of a square in swift

To find the area of a square in Swift, you need to multiply the length of one side by itself. Here's an example code:

main.swift
let sideLength: Double = 5
let area = sideLength * sideLength
print("The area of the square is \(area)")
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In this example, we've defined a variable sideLength with a value of 5. We then calculate the area of the square by multiplying sideLength by itself, and store the result in a variable called area. Finally, we print out the value of area.

Note that we used the Double data type for sideLength to ensure that we get a decimal answer. If you're working with integers only, you can use the Int data type instead.