# Number

The number data type is a double-precision floating-point number. You can manipulate numbers using the arithmetic operators addition (`+`), subtraction (`-`), multiplication (`*`), division (`/`), modulo (`%`), increment (`++`), and decrement (`--`). You can also use methods of the built-in Math object to manipulate numbers. The following example uses the `sqrt` (square root) method to return the square root of the number 100:

    Math.sqrt(100);

See Numeric operators.