# [R] Beginner problem - using mod function to print odd numbers

William Michels wjm1 @end|ng |rom c@@@co|umb|@@edu
Sat Jun 5 20:04:52 CEST 2021

```> i <- 1L; span <- 1:100; result <- NA;
> for (i in span){
+ ifelse(i %% 2 != 0, result[i] <- TRUE, result[i] <- FALSE)
+ }
> span[result]
[1]  1  3  5  7  9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43
45 47 49 51 53 55 57
[30] 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99
>

HTH, Bill.

W. Michels, Ph.D.

On Sat, Jun 5, 2021 at 12:55 AM Stefan Evert <stefanML using collocations.de> wrote:
>
> >
> > I don't understand. --
> >
> > 7%%2=1
> > 9%%2=1
> > 11%%2=1
> >
> > What aren't these numbers printing ?
> >
> > num<-0
> > for (i in 1:100){
> >  num<-num+i
> > if (num%%2 != 0)
> >  print(num)
> > }
>
> Your code tests the numbers
>
>         1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, …
>
> and correctly prints the odd ones among them.
>
> But I suppose that's not what you wanted to do?
>
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