Why combining pipeline operator with ceiling function doesn't work in R?

Question

When I try to use ceiling() function, it works okay, but when I try to divide something and give it to the ceiling function using pipeline operator (2/10 %>% ceiling()), I get a problem.

ceiling(0.2)
1

ceiling(2/10)
1

2/10
0.2

2/10 %>% ceiling()
0.2

2 %>% `/`(10)
0.2

2 %>% `/`(10) %>% ceiling()
1

0.2 %>% ceiling()
1

Answer 1

Because 2/10 %>% ceiling() works as 2/(10 %>% ceiling()), i.e. %>% has precedence over /.

Put differently, 2/10 %>% ceiling() = 2/10 = 0.2

Answer 2

One magrittr solution could be:

2 %>%
 divide_by(10) %>%
 ceiling()

[1] 1

Answer 3

It is because of operator precedence.

You can clarify what you want to do by using round or curly brackets

library(magrittr)
(2/10) %>% ceiling()

{2/10} %>% ceiling()