Use the parseInt Function with a Radix

The parseInt() function parses a string and returns an integer. It takes a second argument for the radix, which specifies the base of the number in the string. The radix can be an integer between 2 and 36.

The function call looks like:

parseInt(string, radix);

And here's an example:

const a = parseInt("11", 2);

The radix variable says that 11 is in the binary system, or base 2. This example converts the string 11 to an integer 3.

基数是2，说的是2进制，所以二进制的11，就是十进制的3. It converts a binary number to an integer and returns it