text: module.exports = function reverse (n) {
      let str = '';
      let m = n;
      if (m < 0) {
          str = String(-m);
      } else { 
          str = String(m);
      }
      let str2 = '';
      let len = str.length;
      for (let i = len-1; i >= 0; i--) {
        str2 += str[i];
      };
      return Number(str2);
  }