123456789 0 91221 999
123456.789 0.888888888
You can use floating point numbers to represent very large or very small numbers. For more information about scientific notation (floating point numbers), see section Exponential Notation.
7 + 2 /* result is 9 */
7 - 2 /* result is 5 */
7 * 2 /* result is 14 */
7 ** 2 /* result is 49 */
7 ** 2.5 /* result is an error */