In R how do I find whether an integer is divisible by a number?

Question

Sorry for the inexperience, I'm a beginning coder in R For example: If I were to make a FOR loop by chance and I have a collection of integers 1 to 100 (1:100), what would be the proper format to ensure that would print the numbers that are divisible by another number. In this case, 5 being the number divisible. I hear that using modulo would help in this instance %%

This is what I think I should have.

For (x in 1:100) {
  x%%5 == y
}
print(y)

Answer 1

for (x in 1:100) { 
  if (x%%5 == 0) {
    print(x)
  }
}

Answer 2

The modulo operator %% is used to check for divisibility. Used in the expression x %% y, it will return 0 if y is divisible by x.

In order to make your code work, you should include an if statement to evaluate to TRUE or FALSE and replace the y with 0 inside the curly braces as mentioned above:

for (x in 1:100) { 
  if (x%%5 == 0) {
    print(x)
  }
}

For a more concise way to check for divisibility consider:

for (x in 1:100) { 
  if (!(x%%5)){
    print(x)
  }
}

Where !(x %% 5) will return TRUE for 0 and FALSE for non-zero numbers.

Answer 3

How's this?

x <- 1:100
div_5 <- function(x) x[x %% 5 == 0]
div_5(x)