repeat循环=while(true)循环
i = 0
repeat {
  i <- i+1
  if(i==4) {
    next;
  }
  print(1:i);
  if(i==10) {
    break;
  }
}
输出结果:
[1] 1
[1] 1 2
[1] 1 2 3
[1] 1 2 3 4 5
[1] 1 2 3 4 5 6
[1] 1 2 3 4 5 6 7
[1] 1 2 3 4 5 6 7 8
[1] 1 2 3 4 5 6 7 8 9
 [1]  1  2  3  4  5  6  7  8  9 10
原文:http://www.cnblogs.com/xugege/p/7357186.html