For in Scala

object ForLoops {
  def main(args: Array[String]): Unit = {
    // The most basic type, with a single condition.
    var i = 1
    while (i <= 3) {
      println(i)
      i += 1
    }

    // A classic initial/condition/after for loop.
    for (j <- 0 until 3) {
      println(j)
    }

    // Another way of accomplishing the basic "do this N times" iteration
    // is to use a range.
    for (i <- 0 until 3) {
      println(s"range $i")
    }

    // A while(true) loop will repeat until you break out of it or return
    // from the enclosing function.
    while (true) {
      println("loop")
      break
    }

    // You can also continue to the next iteration of the loop.
    for (n <- 0 until 6) {
      if (n % 2 == 0) {
        continue
      }
      println(n)
    }
  }
}

In Scala, we have several ways to create loops:

1. The while loop is used for the most basic type of loop with a single condition.

2. The for loop in Scala is more powerful and can be used in various ways. Here, we’ve used it with a range (0 until 3) which is similar to the Go for j := 0; j < 3; j++ loop.

3. Scala doesn’t have a direct equivalent to Go’s for i := range 3. Instead, we use a for loop with a range.

4. For an infinite loop, we use while(true). Note that Scala doesn’t have break or continue statements. To achieve similar functionality, you would typically use recursive functions or other control structures. The break and continue shown in this example are just for illustration and won’t compile in actual Scala code.

5. The last example shows how you might simulate a continue in Scala using an if-else structure.

To run this Scala program:

$ scalac ForLoops.scala
$ scala ForLoops
1
2
3
0
1
2
range 0
range 1
range 2
loop
1
3
5

Remember that Scala encourages a more functional programming style, so while these imperative loops are possible, you might often see more functional approaches using methods like map, filter, and foreach on collections.