scala-5

object LearningScala2 {
  // Flow control
 
  // If / else syntax
  if (1 > 3) println("Impossible!") else println("The world makes sense.")
                                                  //> The world makes sense.
 
  if (1 > 3) {
   println("Impossible!")
  } else {
   println("The world makes sense.")
  }                                               //> The world makes sense.
 
  // Matching - like switch in other languages:
  val number = 3                                  //> number  : Int = 3
  number match {
   case 1 => println("One")
   case 2 => println("Two")
   case 3 => println("Three")
   case _ => println("Something else")
  }                                         //> Three
  
  // For loops
  for (x <- 1 to 4) {
   val squared = x * x
   println(squared)
  }                                         //> 1
                                                  //| 4
                                                  //| 9
                                                  //| 16
                                                 
  // While loops
  var x = 10                                      //> x  : Int = 10
  while (x >= 0) {
   println(x)
   x -= 1
  }                                               //> 10
                                                  //| 9
                                                  //| 8
                                                  //| 7
                                                  //| 6
                                                  //| 5
                                                  //| 4
                                                  //| 3
                                                  //| 2
                                                  //| 1
                                                  //| 0
                                                 
  x = 0
  do { println(x); x+=1 } while (x <= 10)         //> 0
                                                  //| 1
                                                  //| 2
                                                  //| 3
                                                  //| 4
                                                  //| 5
                                                  //| 6
                                                  //| 7
                                                  //| 8
                                                  //| 9
                                                  //| 10
                                                 
   // Expressions
   // "Returns" the final value in a block automatically
  
   {val x = 10; x + 20}                           //> res0: Int = 30
                                               
  println({val x = 10; x + 20})            //> 30
 
  // EXERCISE
  // Write some code that prints out the first 10 values of the Fibonacci sequence.
  // This is the sequence where every number is the sum of the two numbers before it.
  // So, the result should be 0, 1, 1, 2, 3, 5, 8, 13, 21, 34
 
   
}