javascript变量数比数字大多少？

我有这个javascript函数来验证一个数字是否大于另一个数字，但我想知道的是它的大小。所以24等于10，但我想知道14等于多少

if(ranNum > numbered){
            alert("ranNum is greater than your number");
          }else if(ranNum < numbered){
            alert("ranNum is less then your number");
          }else if(ranNum === numbered){
            alert("match");
          }else{
            alert("try again");
          }

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通过减去两个数字并将其添加到警报中来创建差异变量

Var diff = Math.abs (ranNum - numbered);
if(ranNum > numbered) {
    alert("ranNum is greater than your number by: " + diff);
}
else if(ranNum < numbered) {
     alert("ranNum is less then your number by: " + diff);
 }
else if(ranNum === numbered) {
    alert("match");
}
else{
    alert("try again");
}

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减法运算符。我可以使用减法运算符同时执行小于和大于减法运算符吗？