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    <p>This function tests whether the counter array passed in has an element smaller than the specified value:</p> <pre><code>bool has_element_less_than(int value, int counter[N][N]) { for (int i = 0; i &lt; N; i++) { for (int j = 0; j &lt; N; j++) { if (counter[i][j] &lt; value) return true; } } return false; } </code></pre> <p>You use it:</p> <pre><code>if (has_element_less_than(10000, counter)) do_something(); </code></pre> <p>You could deal with variable dimension arrays in C99 by passing N as a parameter to the function. It assumes you have the C99 header <code>&lt;stdbool.h&gt;</code> available and included.</p> <hr> <p>Is this what you're after? You mention 'While' so it isn't clear whether you need to use a <code>while</code> loop — if you do, I think this does the job:</p> <pre><code>int i = 0; while (i &lt; N) { int j = 0; while (j &lt; N) { if (counter[i][j] &lt; 10000) { counter[i][j] = do_something(i, j, counter[i][j]); } j++; } i++; } </code></pre> <p>Or, more colloquially but using <code>for</code> loops:</p> <pre><code>for (int i = 0; i &lt; N; i++) { for (int j = 0; j &lt; N; j++) { if (counter[i][j] &lt; 10000) { counter[i][j] = do_something(i, j, counter[i][j]); } } } </code></pre> <p>Note that this code is using C99; you can declare <code>i</code> and <code>j</code> outside the loops and it becomes C89 code. Also, if for any reason you need <code>i</code> or <code>j</code> (or, more likely, both) after the loop, you need to declare the variables outside the loop.</p> <p>The second solution with <code>for</code> loops is more idiomatic C; the <code>for</code> loop is very good for this job and is what you should plan to use, not least because it packages all the loop controls on a single line, unlike the <code>while</code> loop solution which has the initialize code on one line (outside the loop), the condition on another, and the reinitialization on yet a third line.</p>
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    1. CO@Francisco: you might note that most of the original answers could be trivially adapted to answer the revised question by putting the code in a function, doing the 'do something' when the first value less than your limit is discovered, and then immediately returning. The only downside is hardwiring the action into what is otherwise a general-purpose routine. Also, if you need to know which element is less than the limit, you need a couple of output (pointer) arguments to the `has_element_less_than()` function.
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