What string conversion methods do you know?

There are several ways to convert a string to a number in JavaScript:

1. Number() — converts a string to a number, returns NaN if conversion is impossible.

Number('123'); // 123
Number('12.34'); // 12.34
Number('abc'); // NaN

2. parseInt() — parses an integer from the beginning of the string, ignoring subsequent characters.

parseInt('123abc'); // 123
parseInt('12.34'); // 12

3. parseFloat() — parses a floating-point number from the beginning of the string.

parseFloat('12.34abc'); // 12.34

4. Unary plus (+) — a quick way to convert a string to a number.

+'123'; // 123
+'12.34'; // 12.34
+'abc'; // NaN

5. Math.floor(), Math.ceil(), Math.round() — can be used after conversion for rounding.

The choice of method depends on the task: use parseInt for integers, and parseFloat or Number for floating-point numbers.