Printing Lists

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zig printing lists developer-tips debug-print

Summary

A concise Zig idiom for printing comma-separated lists by conditionally printing the comma before each item except the first.

<header> <h1>Printing Lists</h1> <time class="meta" datetime="2026-08-14">Aug 14, 2026</time> </header> <p>To print a comma-separated list, a concise idiom is to optionally print the comma first, before the element:</p> <figure class="code-block"> <pre><code><span class="line"><span class="hl-keyword">for</span> (items, <span class="hl-numbers">0</span>..) <span class="hl-operator">|</span>item, item_index<span class="hl-operator">|</span> {</span> <span class="line"> <span class="hl-keyword">if</span> (item_index &gt; <span class="hl-numbers">0</span>) std.debug.print(<span class="hl-string">&quot;, &quot;</span>);</span> <span class="line"> std.debug.print(<span class="hl-string">&quot;{}&quot;</span>, .{item})</span> <span class="line">}</span></code></pre> </figure>
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Cached at: 08/14/26, 03:21 PM

# Printing Lists Source: [https://matklad.github.io/2026/08/14/printing-lists.html](https://matklad.github.io/2026/08/14/printing-lists.html) Aug 14, 2026To print a comma\-separated list, a concise idiom is to optionally print the comma first, before the element: ``` for (items, 0..) |item, item_index| { if (item_index > 0) std.debug.print(", "); std.debug.print("{}", .{item}) } ```

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