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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 Prompt Box</title>
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</head>
<body>
<h1>JavaScript prompt() dialog box</h1>
<p>
The prompt() method in JavaScript is used to display a prompt box that
prompts the user for the input. It is generally used to take the input
from the user before entering the page. It can be written without using
the window prefix. When the prompt box pops up, we have to click "OK" or
"Cancel" to proceed.
</p>
<p>
The box is displayed using the prompt() method, which takes two arguments:
The first argument is the label which displays in the text box, and the
second argument is the default string, which displays in the textbox. The
prompt box consists of two buttons, OK and Cancel. It returns null or the
string entered by the user. When the user clicks "OK," the box returns the
input value. Otherwise, it returns null on clicking "Cancel".
</p>
<p>
The box is displayed using the prompt() method, which takes two arguments:
The first argument is the label which displays in the text box, and the
second argument is the default string, which displays in the textbox. The
prompt box consists of two buttons, OK and Cancel. It returns null or the
string entered by the user. When the user clicks "OK," the box returns the
input value. Otherwise, it returns null on clicking "Cancel".
</p>
<h1>Syntax</h1>
<pre
class="language-javascript"
tabindex="0"
><code class="language-javascript"><span class="token function">prompt</span><span class="token punctuation">(</span>message<span class="token punctuation">,</span> <span class="token keyword">default</span><span class="token punctuation">)</span></code></pre>
<h1>Values</h1>
<p>The parameter values of this function are defined as follows.</p>
<p>
<b>message:</b> It is an optional parameter. It is the text displays to
the user. We can omit this value if we don't require to show anything in
the prompt.
</p>
<p>
<b>default:</b> It is also an optional parameter. It is a string that
contains the default value displayed in the textbox.
</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 function">prompt</span><span class="token punctuation">(</span><span class="token string">"What is your Name ?"</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>a<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 = prompt("It is prompt");
</script>
</html>