Takes a number and an integer as parameters, and returns the number with decimal places equal to the integer.
numberis the number to be rounded. (Required)
digitsis the number of decimals when rounding the number. Default is 0.
The default number of decimal places used is 0.
round() can be used with any number of decimal places. Numbers
>= 5 will round up.
round() can be useful when comparing numbers, for example, when comparing fractions and decimals.