
<a href="r6rs-lib-Z-H-1.html#node_toc_node_chap_18">Mutable strings</a></h1>
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The <tt>string-set!</tt> procedure provided by the <tt>(rnrs mutable-strings (6))</tt><a name="node_idx_1278"></a>library allows mutating the characters of a string in-place.</p>
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<div align=left><tt>(<a name="node_idx_1280"></a>string-set!<i> string k char</i>)</tt>&nbsp;&nbsp;&nbsp;&nbsp;procedure&nbsp;</div>
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<p class=noindent><em>K</em> must be a valid index of <i>string</i>.
The <tt>string