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.
Given a year, return the century it is in.
centuryFromYear(1705) returns (18)
centuryFromYear(1900) returns (19)
centuryFromYear(1601) returns (17)
centuryFromYear(2000) returns (20)
function century(year) {
return Math.ceil(year / 100) > 0 ? Math.ceil(year / 100) : 1;
}
const century = year => Math.ceil(year/100)