The latest articles on DEV Community by Nandhini (@nandhu_1105). https://dev.to/nandhu_1105 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4039126%2F8a17efa3-7ff0-4003-91f1-9b6966e5709e.jpg https://dev.to/nandhu_1105 en Nandhini Sat, 29 Aug 2026 15:14:13 +0000 https://dev.to/nandhu_1105/javascript-variables-37i8 https://dev.to/nandhu_1105/javascript-variables-37i8 <p>Hi all, I learned about variables in JavaScript recently.<br> Variables are containers which used to store data.</p> <p>It can be declared in 4 ways.</p> <ul> <li>Using <code>let</code> e.g., </li> </ul> <div class="highlight js-code-highlight"> <pre class="highlight javascript"><code><span class="kd">let</span> <span class="nx">x</span><span class="o">=</span><span class="mi">2</span><span class="p">;</span> <span class="kd">let</span> <span class="nx">y</span><span class="o">=</span><span class="mi">3</span><span class="p">;</span> <span class="kd">let</span> <span class="nx">z</span><span class="o">=</span><span class="nx">x</span><span class="o">+</span><span class="nx">y</span><span class="p">;</span> </code></pre> </div> <ul> <li>Using <code>Const</code> e.g., </li> </ul> <div class="highlight js-code-highlight"> <pre class="highlight javascript"><code><span class="kd">const</span> <span class="nx">x</span><span class="o">=</span><span class="mi">3</span><span class="p">;</span> <span class="kd">const</span> <span class="nx">y</span><span class="o">=</span><span class="mi">4</span><span class="p">;</span> <span class="kd">const</span> <span class="nx">z</span><span class="o">=</span><span class="nx">x</span><span class="o">*</span><span class="nx">y</span><span class="p">;</span> </code></pre> </div> <ul> <li>Using <code>Var</code> e.g., </li> </ul> <div class="highlight js-code-highlight"> <pre class="highlight javascript"><code><span class="kd">var</span> <span class="nx">a</span><span class="o">=</span><span class="mi">1</span><span class="p">;</span> <span class="kd">var</span> <span class="nx">b</span><span class="o">=</span><span class="mi">1</span><span class="p">;</span> <span class="kd">var</span> <span class="nx">c</span><span class="o">=</span><span class="nx">a</span><span class="o">-</span><span class="nx">b</span><span class="p">;</span> </code></pre> </div> <ul> <li>Automatically </li> </ul> <div class="highlight js-code-highlight"> <pre class="highlight plaintext"><code>a=10; b=5; c=a-b; </code></pre> </div> javascript webdev beginners