# About for loop

**URL:** <https://www.ruby-forum.com/t/about-for-loop/132448>\
**Category:** Ruby\
**Created:** [March 20, 2008, 8:30am UTC](https://www.ruby-forum.com/t/about-for-loop/132448 "2008-03-20T08:30:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![blitzer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/ecae2f/32.png) [@blitzer](https://www.ruby-forum.com/u/blitzer)\
**Post date:** [March 20, 2008, 8:30am UTC](https://www.ruby-forum.com/t/about-for-loop/132448/1 "2008-03-20T08:30:34Z")

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for i in 0…5  
print i  
end

it show me ‘012345’.  
and then I want to show ‘543210’ and I try.

for i in 5…0  
print i  
end

it doesn’t work :’(.  
how can I do it??

---

<div class="post-metadata">

**Author:** ![blitzer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/ecae2f/32.png) [@blitzer](https://www.ruby-forum.com/u/blitzer)\
**Post date:** [March 20, 2008, 8:53am UTC](https://www.ruby-forum.com/t/about-for-loop/132448/2 "2008-03-20T08:53:27Z")

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Pat K. wrote:

> for i in 0…5  
> print i  
> end

For loops are not very rubyish. Please use an internal iterator instead.  
For example:  
(0…5).each { |i| print i }  
or  
0.upto(5) { |i| print i }  
or  
6.times { |i| print i }

> it show me ‘012345’.  
> and then I want to show ‘543210’ and I try.
> 
> for i in 5…0  
> print i  
> end
> 
> it doesn’t work :’(.  
> how can I do it??

5.downto(0) { |i| print i }

Best regards,

Jari W.