for Loop

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for Loop

for Loop

A basic for loop, for (i <- 1 to 5) { ... }, iterates over a Range or any collection, running the block once per element. to is inclusive of its endpoint while until excludes it. This simple form is a statement producing Unit, used purely for its side effects like printing.

Note: 1 until 5 excludes 5, while 1 to 5 includes it -- easy to mix up at a glance.

Example: for Loop

markup

object Main extends App {
  for (i <- 1 to 5) {
    println(s"Count: $i")
  }

  for (i <- 0 until 3) {
    println(s"Zero-based: $i")
  }
}

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if / else
while Loop
for Loop
for Comprehension Basics
do-while Loop
break and continue (scala.util.control.Breaks)
yield in for

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for Loop

for Loop

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