# [Newbies] "Print specific integers" Error message, how to improve ?

Benoit St-Jean bstjean at yahoo.com
Thu Nov 16 08:33:09 UTC 2017

```Q1) Because you increment n when you hit 123, so the index is now 8 but your array only has 7 elements.
Q2) You could do it in a zillion way, the simplest one is like:
| myArray|

myArray := #(2 32 44 67 89 111 123).

1 to: 130 do: [:i | (myArray includes: i) ifTrue: [ Transcript show: i; cr ]].

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On Thursday, November 16, 2017, 3:19:49 AM EST, RedTigerFish <chihuyu at gmail.com> wrote:

Hello, *what I want is:*
>From integers 1 to 130, I want to print some specific integers already given
in an array.
They are: 2 32 44 67 89 111 123 which are stored in small-to-big order.

*Here's my codes:*

|a n myArray|

myArray := #(2 32 44 67 89 111 123).

n := 1.
a := myArray at: n.

1 to: 130 do: [:i|
i = a
ifTrue: [
Transcript show: i; cr.
n := n + 1.
a := myArray at: n.
].
].

The output is very good except for an Error Message.

<http://forum.world.st/file/t371379/errormessage.png>

By my current level, I have no idea why that Error Message appears.

Q1: Why  Error Message appears ?
Q2: How can I improve that?

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