R: data

data()

# Loading
data(mtcars)
# Print the first 6 rows
head(mtcars, 6)

# 1. Loading 
data("mtcars")
# 2. Print
head(mtcars)
summary(mtcars)

# Number of rows (observations)
nrow(mtcars)
# Number of columns (variables)
ncol(mtcars)

data("iris")
head(iris)

data("ToothGrowth")
head(ToothGrowth)

data("PlantGrowth")
head(PlantGrowth)

data("USArrests")
head(USArrests)