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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>JS Logical Operators</title>
<style>
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<body>
<h1>Logical Operators in JavaScript</h1>
<table>
<tr>
<th>Operator</th>
<th>Name</th>
<th>Example</th>
</tr>
<tr>
<td>&&</td>
<td>Logical And</td>
<td>( a< 5 && b>2)</td>
</tr>
<tr>
<td>||</td>
<td>Logical Or</td>
<td>(a<5 || b>2)</td>
</tr>
<tr>
<td>!</td>
<td>Not</td>
<td>(a!=5)</td>
</tr>
</table>
<hr />
<h3>Example:</h3>
<pre
class="language-markup"
tabindex="0"
><code class="language-markup"><span class="token doctype"><span class="token punctuation"><!</span><span class="token doctype-tag">DOCTYPE</span> <span class="token name">html</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>html</span> <span class="token attr-name">lang</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>en<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>head</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>meta</span> <span class="token attr-name">charset</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>UTF-8<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>meta</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>viewport<span class="token punctuation">"</span></span> <span class="token attr-name">content</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>width=device-width, initial-scale=1.0<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>meta</span> <span class="token attr-name">http-equiv</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>X-UA-Compatible<span class="token punctuation">"</span></span> <span class="token attr-name">content</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>ie=edge<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>title</span><span class="token punctuation">></span></span>JavaScript<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>title</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>script</span><span class="token punctuation">></span></span><span class="token script"><span class="token language-javascript">
<span class="token comment">/* Logical And Operator */</span>
<span class="token keyword">var</span> age <span class="token operator">=</span> <span class="token number">18</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>age <span class="token operator">>=</span> <span class="token number">18</span> <span class="token operator">&&</span> age <span class="token operator"><=</span> <span class="token number">21</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span><span class="token string">"Yes you are eligible."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span><span class="token string">"<br><br>"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">/* Logical OR Operator */</span>
<span class="token keyword">var</span> a <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> b <span class="token operator">=</span> <span class="token number">15</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>a <span class="token operator">>=</span> <span class="token number">8</span> <span class="token operator">||</span> b <span class="token operator"><=</span> <span class="token number">15</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span><span class="token string">"Yes you are eligible."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span><span class="token string">"<br><br>"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">/* Logical Not Operator */</span>
<span class="token keyword">var</span> x <span class="token operator">=</span> <span class="token number">30</span><span class="token punctuation">;</span>
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token operator">!</span>x <span class="token operator">>=</span> <span class="token number">12</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>script</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>body</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>body</span><span class="token punctuation">></span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>html</span><span class="token punctuation">></span></span></code></pre>
</body>
<script>
let a = 60;
let b = 40;
if (a >= b && b <= a) {
document.write("Condition is true" + "<br><br>");
}
a = 50;
b = 50;
if (a == b || b === a) {
document.write("Both variable is equal together" + "<br><br>");
}
a = 50;
b = 50;
if (!a == b) {
document.write("Both variable is equal together" + "<br><br>");
}
</script>
</html>