thu R ngay 1

Var2 <- 'Hello'
var_phamloan89 = 4
'Hello' -> var3
'.Bun17' -> var5
ls(all.names = TRUE)

## [1] "var_phamloan89" "Var2"           "var3"           "var5"

var6 = 'Xoai'
ls()

## [1] "var_phamloan89" "Var2"           "var3"           "var5"          
## [5] "var6"

rm(var6)
ls()

## [1] "var_phamloan89" "Var2"           "var3"           "var5"