JavaScript Type Conversion

JavaScript variables can be converted to a new variable and another data type:

converts a variable (or a value) into a number. A numeric string (like "3.14") converts to a number (like 3.14). An empty string (like "") converts to 0. A non numeric string (like "John") converts to

(Not a Number).

Number("3.14") Number(Math.PI) Number(" ") Number("")

Number("99 88") Number("John")

Number Methods, you will find more methods that can be used to convert strings to numbers:

Returns a number, converted from its argument parseFloat() Parses a string and returns a floating point number parseInt()

// x is a number If the variable cannot be converted, it will still become a number, but with the value

(Not a Number):