function
boot.janet on line 780 , column 1
(sum x )
Returns the sum of the values of `x` . If `x` is empty , returns 0.
`x` can be a bytes , indexed , dictionary , fiber , or abstract type
with suitable `get` and `next` methods.
(+ 1 2 3 ) # => 6
(sum [1 2 3 ]) # => 6