><span class="token keyword">const</span> firstName<span class="token punctuation">;</span> <span class="token comment">// Uncaught SyntaxError: Missing initializer in const declaration</span>
<span class="token keyword">const</span> firstName <span class="token operator">=</span> <span class="token string">'Gob'</span><span class="token punctuation">;</span>
firstName <span class="token operator">=</span> <span class="token string">'George Michael'</span><span class="token punctuation">;</span> <span class