seq(1,10)
##  [1]  1  2  3  4  5  6  7  8  9 10
x <- "hello world"
x
## [1] "hello world"
y <- seq(1, 10, length.out = 5)
y
## [1]  1.00  3.25  5.50  7.75 10.00
(y <- seq(1, 10, length.out = 5))
## [1]  1.00  3.25  5.50  7.75 10.00

4.4 Practice