Digit Sum for Integer Values

Computes the sum of digits for whole-numbered inputs. Negative values are handled by taking the absolute value.

Usage

digitSum(x)

Arguments

x

an integer vector, or a numeric vector of whole numbers.

Value

an integer vector containing the digit sums.

Details

The function accepts integer vectors as well as doubles holding whole numbers (e.g. 124 and 124L are both valid). Fractional values raise an error. Missing values (NA) are propagated.

See also

Other number.theory: GCD-LCM, divisors(), factorize(), fibonacci(), isOdd(), isPrime(), primes()

Examples

digitSum(124)
#> [1] 7
digitSum(c(10L, 99L, -1234L))
#> [1]  1 18 10