print("Hello World!")
## [1] "Hello World!"
# Variable
var_name <- 10
var_str_1 <- "Hello Dai Loi"
"Hello Dai Loi" -> var_str_2
var_int_1 = 4
# Note 4 = var_int_1
#print() all variable
ls()
## [1] "var_int_1" "var_name"  "var_str_1" "var_str_2"
#clearn variable
rm(var_int_1)
vec <- 1:10
vec2 <- seq(from = 1, to = 10, by = 3)
vec3 <- c(2,4,6,8,10)
print(vec)
##  [1]  1  2  3  4  5  6  7  8  9 10
print(vec2)
## [1]  1  4  7 10
print(vec3)
## [1]  2  4  6  8 10