How do you convert a string to a number in JavaScript?

In JavaScript, you can convert a string to a number using many methods.

1. parseInt() function:

   This function parses a string argument and returns an integer of the specified radix (base). If no radix is specified, it assumes the input is in base 10.

   For example:

   let stringNum = "100";
   let number = parseInt(stringNum); // returns 100

2. parseFloat() function:

   This function parses a string argument and returns a floating-point number. If the string cannot be converted to a number, it returns NaN.

   For example:

   let stringNum = "3.1415";
   let number = parseFloat(stringNum); // returns 3.1415

3. Number () constructor:

   This constructor can be used to convert a string to a number. It returns NaN if the input cannot be converted.

   let stringNum = "10";
   let number = Number(stringNum); // returns 10

4. Plus(+) operator:

   Using plus(+) operator, we can convert any string to a number. If that string contains any non numeric character, then the converted value will be NaN.

   let stringNum = "50";
   let number = +stringNum; // returns 50

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