The integer data type can hold only integer values:

Input:

source_code/appendix_b_r/example02_int.r
#Integer constants are suffixed with L.
rectangle_side_a = 10L
rectangle_side_b = 5L
rectangle_area = rectangle_side_a * rectangle_side_b
rectangle_perimeter = 2*(rectangle_side_a + rectangle_side_b)
#The command cat like print can also be used to print the output
#to the command line.
cat("Let there be a rectangle with the sides of lengths:", rectangle_side_a, "and", rectangle_side_b, "cm.
")
cat("Then the area of the rectangle is", rectangle_area, "cm squared.
")
cat("The perimeter of the rectangle is", rectangle_perimeter, "cm.
")

Output:

$ Rscript example02_int.r 
Let there be a rectangle with the sides of lengths: 10 and 5 cm.
Then the area of the rectangle is 50 cm squared.
The perimeter of the rectangle is 30 cm.