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<!DOCTYPE html>
<html lang="en">
<head>
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<title>JS Functions with Parameters</title>
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<body>
<h1>JS Functions with Parameters</h1>
<p>
The Javascript Function Parameters are the names that are defined in the
function definition and real values passed to the function in the function
definition are known as arguments.
</p>
<h1>Syntax:</h1>
<pre
class="language-javascript"
tabindex="0"
><code class="language-javascript"><span class="token keyword">function</span> <span class="token function">Name</span><span class="token punctuation">(</span><span class="token parameter">paramet1<span class="token punctuation">,</span> paramet2<span class="token punctuation">,</span> paramet3<span class="token punctuation">,</span><span class="token operator">...</span></span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token comment">// Statements</span>
<span class="token punctuation">}</span></code></pre>
<h1>Parameter Rules:</h1>
<ul>
<li>
There is no need to specify the data type for parameters in JavaScript
function definitions.
</li>
<li>
It does not perform type-checking based on the passed-in JavaScript
functions.
</li>
<li>It does not check the number of received arguments.</li>
</ul>
<h1>Parameters:</h1>
<ul>
<li>Name: It is used to specify the name of the function.</li>
<li>Arguments: It is provided in the argument field of the function.</li>
</ul>
<h1>Default Parameter:</h1>
<p>
The default parameters are used to initialize the named parameters with
default values in case, when no value or undefined is passed.
</p>
<h1>Syntax:</h1>
<pre
class="language-javascript"
tabindex="0"
><code class="language-javascript"><span class="token keyword">function</span> <span class="token function">Name</span><span class="token punctuation">(</span><span class="token parameter">paramet1 <span class="token operator">=</span> value1<span class="token punctuation">,</span> paramet2 <span class="token operator">=</span> value2 <span class="token punctuation">.</span><span class="token punctuation">.</span> <span class="token punctuation">.</span></span><span class="token punctuation">)</span>
<span class="token punctuation">{</span>
<span class="token comment">// statements</span>
<span class="token punctuation">}</span></code></pre>
<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 comment">/* Functions With Parameters*/</span>
<span class="token keyword">function</span> <span class="token function">hello</span><span class="token punctuation">(</span>fname<span class="token operator">=</span> <span class="token string">"Yahoo"</span><span class="token punctuation">,</span>lname<span class="token operator">=</span> <span class="token string">"Baba"</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">"Hello"</span> <span class="token operator">+</span> fname <span class="token operator">+</span> <span class="token string">" "</span> <span class="token operator">+</span> lname <span class="token operator">+</span> <span class="token string">"<br>"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token function">hello</span><span class="token punctuation">(</span><span class="token string">"Ram"</span><span class="token punctuation">,</span><span class="token string">"Singh"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">hello</span><span class="token punctuation">(</span><span class="token string">"Salman"</span><span class="token punctuation">,</span> <span class="token string">"Khan"</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>
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