Ways to convert a string to a number.

 

1. ParseInt()

ParseInt allows for spaces. One downside is that a decimal number passed in will be rounded off to the nearest decimal point and converted to a number.

 

2. Number()

Number() could be used instead of parseInt() because it can convert a decimal number without rounding it down. Returns NAN when value cannot be converted.

 

3. The Unary Operator

Add the plus operator before any string value and it will be converted to a number.

 

4. ParseFloat()

Works better with decimal numbers. Will return NAN if conversion is not possible and only converts the first number when multiple string values are passed in.

 

5. floor()

Using Math.floor() also isn’t kind to decimal conversions because it returns the largest number less than or equals to the number passed in.

 

6. Multiplication

Simply multiplying your string with 1, converts it to a number. It’s also decimal friendly.

 

7. Double Tilde

A double tilde (~~) works the same as the unary operator (+), except it will round down any decimal number.

Happy coding 🙂