1
var judgeCircle = function (moves) {
2
  let x = 0,
3
    y = 0;
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  for (i = 0; i < moves.length; i++) {
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    switch (moves[i]) {
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      case "R":
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        x++;
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        break;
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      case "L":
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        x--;
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        break;
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      case "U":
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        y++;
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        break;
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      case "D":
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        y--;
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        break;
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    }
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  }
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  return x === 0 && y === 0;
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};