Is a year a leap year?

Returns TRUE if the year is a leap year. You can use "negative" years for BCE.

Usage

isLeapYear(x)

Arguments

x

Integer or vector of integers representing years.

Value

Vector of logical values.

Examples

isLeapYear(1990:2004) # note 2000 *was* not a leap year
#>  [1] FALSE FALSE  TRUE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE  TRUE FALSE
#> [13] FALSE FALSE  TRUE
isLeapYear(1896:1904) # 1900 was *not* a leap year
#> [1]  TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE