Error Handling in Rust that Every Beginner should Know (Scala way)

circle_equation.scala

def square(s: String): Try[Double] = Try {
    val i = s.toDouble
    i * i
}

def calculate(x: String, y: String): Try[Double] = {
    for {
        x <- square(x)
        y <- square(y)
    } yield Math.sqrt(x + y)
}

println(calculate("2", "2")) // Success(2.828)
println(calculate("2", "x")) // Failure(java.lang.NumberFormatException)