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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 Assignment Operators</title>
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<body>
<h1>JS Assignment Operators</h1>
<p>
JavaScript assignment operator is equal (=) which assigns the value of the
right-hand operand to its left-hand operand. That is if a = b assigns the
value of b to a.
</p>
<p>
The simple assignment operator is used to assign a value to a variable.
The assignment operation evaluates the assigned value. Chaining the
assignment operator is possible in order to assign a single value to
multiple variables.
</p>
<table>
<tr>
<th>Operators</th>
<th>Examples</th>
<th>Same As</th>
</tr>
<tr>
<td>=</td>
<td>x = y</td>
<td>x = y</td>
</tr>
<tr>
<td>+=</td>
<td>x += y</td>
<td>x = x + y</td>
</tr>
<tr>
<td>-=</td>
<td>x -= y</td>
<td>x = x - y</td>
</tr>
<tr>
<td>*=</td>
<td>x *= y</td>
<td>x = x * y</td>
</tr>
<tr>
<td>/=</td>
<td>x /= y</td>
<td>x = x / y</td>
</tr>
<tr>
<td>%=</td>
<td>x %= y</td>
<td>x = x % y</td>
</tr>
<tr>
<td>**=</td>
<td>x **= y</td>
<td>x = x ** y</td>
</tr>
</table>
<h1>Syntax</h1>
<p>data=value</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 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">/* Equalto Assignment Operators */</span>
<span class="token keyword">var</span> m <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> n <span class="token operator">=</span> <span class="token number">3</span><span class="token punctuation">;</span>
o <span class="token operator">=</span> m <span class="token operator">+</span> n<span class="token punctuation">;</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>o<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">/* Addition Assignment Operators */</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">3</span><span class="token punctuation">;</span>
a <span class="token operator">+=</span> b<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>
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">/* Subtraction Assignment Operators */</span>
<span class="token keyword">var</span> m <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> n <span class="token operator">=</span> <span class="token number">3</span><span class="token punctuation">;</span>
m <span class="token operator">-=</span> n<span class="token punctuation">;</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>m<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">/* Multiplication Assignment Operators */</span>
<span class="token keyword">var</span> p <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> q <span class="token operator">=</span> <span class="token number">3</span><span class="token punctuation">;</span>
p <span class="token operator">*=</span> q<span class="token punctuation">;</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>p<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">/* Exponentiation Assignment Operators */</span>
<span class="token keyword">var</span> d <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> e <span class="token operator">=</span> <span class="token number">3</span><span class="token punctuation">;</span>
d <span class="token operator">**=</span> e<span class="token punctuation">;</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>d<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">/* Division Assignment Operators */</span>
<span class="token keyword">var</span> s <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> t <span class="token operator">=</span> <span class="token number">3</span><span class="token punctuation">;</span>
s <span class="token operator">/=</span> t<span class="token punctuation">;</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>s<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">/* Modulus(Remainder) Assignment Operators */</span>
<span class="token keyword">var</span> x <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> y <span class="token operator">=</span> <span class="token number">3</span><span class="token punctuation">;</span>
x <span class="token operator">%=</span> y<span class="token punctuation">;</span>
document<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>x<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></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 = 6;
let b = 5;
a += b;
document.write("a += b = " + a + "<br>" + "<br>");
let c = 11;
let d = 10;
c += d;
document.write("c += d = " + c + "<br>" + "<br>");
let e = 5;
let f = 5;
e *= f;
document.write("e *= f = " + e + "<br>" + "<br>");
let g = 5;
let h = 5;
g /= h;
document.write("e /= f = " + g + "<br>" + "<br>");
let i = 5;
let j = 5;
i %= j;
document.write("i /= j = " + i + "<br>" + "<br>");
let k = 5;
let l = 5;
k **= l;
document.write("k /= l = " + k + "<br>" + "<br>");
</script>
</html>