control flow in Nim

control.nim

import strutils, random

randomize()
let answer = rand(10)
while true:
  echo "Guess the number?"
  let guess = parseInt(stdin.readLine)

  if guess < answer:
    echo "Less than answer"
  elif guess > answer:
    echo "Too high"
  else:
    echo "Correct"
    break

block busyloops:
  while true:
    while true:
      echo "Inside busyloops"
      break busyloops