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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
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<title>JS Do While Loop</title>
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<body>
<h1>JS Do While Loop</h1>
<p>
A do… while loop in JavaScript is a control statement in which the code is
allowed to execute continuously based on a given boolean condition. It is
like a repeating if statement.
</p>
<p>
The do…while loop can be used to execute a specific block of code at least
once.
</p>
<h3>Syntax:</h3>
<pre
class="language-javascript"
tabindex="0"
><code class="language-javascript"><span class="token keyword">do</span> <span class="token punctuation">{</span>
<span class="token comment">// Statements</span>
<span class="token punctuation">}</span>
<span class="token keyword">while</span><span class="token punctuation">(</span>conditions<span class="token punctuation">)</span></code></pre>
<p>
The main difference between do…while and while loop is that it is
guaranteed that do…while loop will run at least once. Whereas, the while
loop will not run even once if the given condition is not satisfied.
</p>
<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 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>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 keyword">var</span> a <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span>
<span class="token keyword">do</span><span class="token punctuation">{</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>a <span class="token operator">+</span> <span class="token string">" Hello Yahoo Baba<br>"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
a<span class="token operator">++</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token keyword">while</span><span class="token punctuation">(</span>a <span class="token operator"><=</span> <span class="token number">10</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 = 50000;
do {
document.write(a + "). " + "HELLO SIR.<br>");
a = a - 1;
} while (a >= 1);
</script>
</html>