Converting to the Number Type

JavaScript provides three functions to convert non-numeric values into numbers:

1. the Number() casting function
2. the parseInt() function
3. the parseFloat() function

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While Number() is used to convert any data to numbers, parseInt() and parseFloat() are used specifically to convert strings to numbers.

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The first function that can be used to convert non-numeric values into numbers is the Number() casting function.

The Number() function

Rules of the Number() Function

The Number() function uses these rules:

• An undefined value returns NaN.

• null is converted to 0.

• When the argument is a number, it ...