Simple (and probably stupid) question about for loops

[AlbFrigerio]

Hi everyone, I believe I'm really rusty in using Octave cause I'm trying to
do a very simple thing (in my mind) but I cannot succed in it. I tried to
read the guide and some posts on for loops, but I haven't managed anything.

Here it is my question : is it possible to update the value of the for index
inside the loop?

For example, I wrote the following code :

for k=1:10
  k
  if k==2
     k=5;
  endif
endfor

I'd like the output to be : 1 2 6 7 8 9 10 , but it always gives me 1 2 3 4
... 10 . It sounds like the k variable in the loop to be completely
different from the one used in the loop.

Is there a way to solve this problem? I could obviously use a while or do
loop, I just wanna know if there is a way with for ones.

Sorry to bother with this (probably) stupid question, but I cannot manage it
on my own.

Have a nice day,
   Alberto

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