>();
<span class='kw'>let</span> <span class='ident'>world</span> <span class='op'>=</span> <span class='string'>&quot;world!&quot;</span>.<span class='ident'>to_string</span>();

<span class='kw'>let</span> <span class='ident'>hello_world</span> <span class='op'>=</span> <span class='ident'>hello</span> <span class='op'>+</span> <span class='kw-2'>&amp;</span><span class='ident'>world</span>;</pre>

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