js小白_一组数字,比较得出最大一个数字,渡一课程回顾

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      var arr = [123,456,79,456,79,13,46,8798];
      function theMax (arr) {
        var len = arr.length;
        var bigNum = arr[0];
        for(var i = 0;i < len; i ++){
          if(bigNum < arr[i]){bigNum = arr[i]}
        }
        return bigNum
      }
      console.log(theMax(arr));

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      function theMax (arr) {
      	arr.sort(function (a,b) {
      		return b - a//降序
      	});
      	return arr[0];
      }
      
      
      console.log(theMax(arr));