How js converts floating-point numbers to integers

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Convert floating point numbers to integers

You usually use Math.floor (), Math.ceil (), or Math.round () to convert floating-point numbers to integers. There is also a faster way in JavaScript to truncate floating-point numbers to integers using | (bits or operators).

Console.log; > Result: 23console.log (- 23.9 | 0); > Result:-23

| the behavior depends on whether you are dealing with positive or negative numbers, so it is best to use this shortcut only when you are sure.

If n is a positive number, then n | 0 effectively rounds down. If n is negative, it is effectively rounded. More precisely, this operation deletes the contents after the decimal point and truncates the floating point to an integer. You can also use ~ ~ to get the same rounding effect, and as mentioned above, virtually any bit operator forces a floating-point number to be an integer. These special operations are effective because once forced to an integer, the value remains the same.

| it can also be used to delete any number of numbers from the end of an integer. This means that we do not need to convert types like this:

Let str = "1553"; Number (str.substring (0, str.length-1)); > Result:

We can use the | operator instead as follows:

Console.log (1553 / 10 | 0) > Result: 155console.log (1553 / 1000 | 0) > Result: 15console.log (1553 / 1000 | 0) > Result: 1 is all the content of the article "how js converts floating-point numbers to integers". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!