Implementation Method of Javascript Obtaining Random Numbers

Implementation of Javascript to Get Random Numbers

<script type="text/javascript">
  function getRandom(n,m){
    var n=Number(n);  // Force to Number 
    var m=Number(m);
    if(isNaN(n)||isNaN(m)){  // Determine whether it is a valid number   Where 1 Return without a valid number [0,1) Random decimals between 
      return math.random();
    }
    if(n>m){   // If n>m Then exchange 
      var temp=n;
      n=m;
      m=temp;
    }
    return Math.round(Math.random()*(m-n)+n);

  }
  // Obtain 5 position 0-50 Random integers between 
  var ary=[];
  for (var i=0;i<5;i++){
    ary.push(getRandom(0,50));
  }console.log(ary);

</script>