如何检查一个数字是否大于另一个数字，一定数量？

Question

我将如何制作以下if语句？

var a = 50;
var b = 10;

if(a > b by 20){
    console.log("a is too big");
}

Answer 1

if(a - b > 20) {
  console.log('You didnt try much it seems')

}

Answer 2

你为什么不这样做：

if (a > (b + 20)) {
  console.log("a is too big");
}