R: += (plus equals) and ++ (plus plus) equivalent from c++/c#/java, etc.?

Question

Does R have a concept of += (plus equals) or ++ (plus plus) as c++/c#/others do?

Answer 1

Following @GregaKešpret you can make an infix operator:

`%+=%` = function(e1,e2) eval.parent(substitute(e1 <- e1 + e2))
x = 1
x %+=% 2 ; x