Given a year, return the century it is in. The first century spans from the year 1 up to and including the year 100, the second – from the year 101 up to and including the year 200, etc.
year = 1905, the output should be
centuryFromYear(year) = 20;
year = 1700, the output should be
centuryFromYear(year) = 17.
The first step in getting the answer is to take the param year and divide by 100 to get the base number. The variable returned includes a decimal. We can return a whole number by using the Math.ceil(), which return the smallest integer greater than or equal to the given number.