Variables and Numbers x<- 1 y = 2 3 -> z x+y ## [1] 3 x*z ## [1] 3 y/x ## [1] 2 Vectors a <- 0:10 print(a) ## [1] 0 1 2 3 4 5 6 7 8 9 10 b <- 10:-4 print(b) ## [1] 10 9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 class(a) ## [1] "integer" str(a) ## int [1:11] 0 1 2 3 4 5 6 7 8 9 .