How to round division in js

In JavaScript, the following two methods can be used to round the result of division: The Math.floor() method returns the value of the floating point number after rounding down. The symbol "|" performs bitwise OR operation, truncates the decimal part and returns an integer.

#How to get the result of integer division in JS?

In JavaScript, the result of division is usually a floating point number. However, sometimes we may need to round the results. To achieve this, there are two common ways:

1. Use the Math.floor() method

The Math.floor() method returns a floating point number downward The rounded value. For example:

<code class="javascript">const result = Math.floor(10 / 3); // 结果为 3</code>

2. Use the symbol "|"

In JavaScript, the symbol "|" can be used to perform bit operations. When used with numbers, it performs a bitwise OR operation on the numbers, truncating the fractional part and returning an integer. For example:

<code class="javascript">const result = 10 / 3 | 0; // 结果为 3</code>

Compare

There is no significant difference in performance between these two methods. However, the Math.floor() method is easier to understand, and the notation "|" may be more concise in some cases.

Example

Here is an example of round division using both methods:

<code class="javascript">const num1 = 10;
const num2 = 3;

console.log("使用Math.floor()取整：", Math.floor(num1 / num2));
console.log("使用\"|\"取整：", num1 / num2 | 0);</code>

Output:

<code>使用Math.floor()取整： 3
使用"|"取整： 3</code>

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