在javascript中强制使用大量数字

Question

I have a javascript function which compares two numbers. If one number is bigger than the other, then a function runs.

if (x > y) {
  // do something
} else {
  // do something else
}

I have a situation where I need x to always have a greater value than y .

At the moment I am doing this by using a very large number, like so

var x = 9999999999999999

Although this works perfectly well, it feels like a hack.

I have considered using a function to calculate a number which will always be bigger than y , but it seems counterproductive to add extra calculations to a program when not strictly necessary.

Can anyone confirm what is the best practice in this situation?

Answer 1

You could take the maximum of Infinity .

 console.log(Infinity); console.log(Infinity > Number.MAX_VALUE); // always true

Answer 2

You can use Number.MAX_VALUE

x = Number.MAX_VALUE

witch equals to 1.7976931348623157e+308

Answer 3

You can use Infinity .

The value Infinity (positive infinity) is greater than any other number.

var x = Infinity; 
// or Number.POSITIVE_INFINITY
// or 1/0

Answer 4

maxValue = x > y ? x++ : y++;

This will be useful if you need it to always generate a value greater than those entering the condition.

Answer 5

if (x > y) {
  // do something
} else {
  // do something else
}

I have a situation where I need x to always have a greater value than y.

Are you trying to force the true condition in order to call // do something directly or is there a need beyond this code for x to have a larger value?

Instead of forcing the true condition, move the somethings into functions, then update your code

(x > y) ? doSomething() : doSomethingElse();

Now you can call doSomething() whenever you want.