How would I write this code without using loops?

2 views (last 30 days)
x57a= [];
for i= 1:1000
if rem(i,5) ==0 || rem(i,7) ==0
if rem(i,5)==0 && rem(i,7) ==0
continue;
end
x57a = [x57a, i];
end
end
I wrote this for loop that gives me the multiples of 5 and 7 (but not both) in 1 to 1000, but I am having trouble rewriting it using indexing or even the find function. I just don't want to use loops
  1 Comment
Hiro Yoshino
Hiro Yoshino on 5 Feb 2020
I don't get what you want to do.
Can you elaborate on it a bit more?

Sign in to comment.

Answers (2)

KSSV
KSSV on 5 Feb 2020
i = 1:1000 ;
O = zeros(size(i)) ;
idx1 = rem(i,5)==O | rem(i,7)==O ;
idx2 = rem(i,5)==O & rem(i,7)==O ;
iwant = find(idx1 ~= idx2) ;

Alex Mcaulley
Alex Mcaulley on 5 Feb 2020
Another option:
N = 1000;
five = 2*5:5:N;
seven = 2*7:7:N;
res = setxor(five,seven)

Categories

Find more on Loops and Conditional Statements in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!