While Loop

Flow-Wing supports the while keyword to iterate over a sequence of values.

Example Usage:

var i: int = 0

while i < 10 {
  print(i + " ")
  i = i + 1
}

Output:

0 1 2 3 4 5 6 7 8 9

Example Usage: With Break

var i: int = 0

while i < 10 {
  if i == 5 {
      break
  }
  print(i + " ")
  i = i + 1
}

Output:

0 1 2 3 4

Example Usage: With Continue

var i: int = 0

while i < 10 {
  if i == 5 {
      i = i + 1
      continue
  }
  print(i + " ")
  i = i + 1
}

Output:

0 1 2 3 4 6 7 8 9

Example Usage: Infinite Loop with Break

The while true pattern creates an infinite loop that exits via break:

var i: int = 0

while true {
  print(i + " ")
  i = i + 1
  if i == 10 {
      break
  }
}

Output:

0 1 2 3 4 5 6 7 8 9

Example Usage: Nested While Loop

var i: int = 0

while i < 3 {
  var j: int = 0
  while j < 3 {
      print("(", i, ",", j, ") ")
      j = j + 1
  }
  i = i + 1
}

Output:

(0,0) (0,1) (0,2) (1,0) (1,1) (1,2) (2,0) (2,1) (2,2)