1

I came across below code

v <- c( 2,5.5,6)
t <- c(8, 3, 4)
print(v/t)
print(v%/%t)

In what way 3rd and 4th lines of code are different?

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3
  • / is division while %/% is integer division Commented Jan 3, 2020 at 10:35
  • I do not understand how you can ask if the 3rd and 4th code lines are the same, their results are different. Commented Jan 3, 2020 at 10:45
  • @Monic I first saw the example of two vectors which has only 0's and 1's .Since I was new to r programming, I am in tense and immediately posted this question. Commented Jan 3, 2020 at 10:54

2 Answers 2

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5

/ does the usual division.

Regarding %/%, the documentation states:

%% indicates x mod y and %/% indicates integer division. It is guaranteed that x == (x %% y) + y * ( x %/% y ) (up to rounding error) unless y == 0 […]

To find the documentation for such operators, enter the following on the R console:

help("%/%")
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2 Comments

I recommend the help function with standard evaluation: help("%/%")
I prefer it for didactic reasons ... With ? you need to know when to use backtics and stuff. Personally, I use RStudio's documentation pane.
3

Both are arithmetic operators. The first one is division, the second is integer division. See here: https://www.statmethods.net/management/operators.html

> 10/3
[1] 3.333333
> 10%/%3
[1] 3

In addition, there is also modulus division (x %% y)

> 10%%3
[1] 1

That's all I know about division operators :-)

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