In Swift, we use the sqrt() function to calculate the square root of a number. The sqrt() function takes a numeric argument and returns the square root of that number. Here's an example:
let number = 25
let squareRoot = sqrt(Double(number))
print(squareRoot) // Output: 5.0
In this example, we first declare a constant number and set it to 25. We then call the sqrt() function and pass in number as an argument. Since sqrt() takes a Double argument, we need to convert number to a Double using the Double() initializer. Finally, we print the result to the console.
We can also calculate the square root of decimal numbers using the sqrt() function. Here's an example:
let decimalNumber = 2.25
let decimalSquareRoot = sqrt(decimalNumber)
print(decimalSquareRoot) // Output: 1.5
In this example, we declare a constant decimalNumber and set it to 2.25. We then call the sqrt() function on decimalNumber and print the result to the console. Note that since decimalNumber is already a Double, we don't need to convert it before calling sqrt().