blob: 00dcee2a1ef359f4faedf6c05b3505bda7ec9a98 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
---
title: Subtraction (-)
slug: Web/JavaScript/Reference/Operators/Subtraction
translation_of: Web/JavaScript/Reference/Operators/Subtraction
---
<div>{{jsSidebar("Operators")}}</div>
<p>The subtraction operator (<code>-</code>) subtracts the two operands, producing their difference.</p>
<div>{{EmbedInteractiveExample("pages/js/expressions-subtraction.html")}}</div>
<div></div>
<h2 id="语法">语法</h2>
<pre class="syntaxbox notranslate"><strong>Operator:</strong> <var>x</var> - <var>y</var>
</pre>
<h2 id="Examples">Examples</h2>
<h3 id="Subtraction_with_numbers">Subtraction with numbers</h3>
<pre class="brush: js notranslate">5 - 3 // 2
3 - 5 // -2</pre>
<h3 id="Subtraction_with_non-numbers">Subtraction with non-numbers</h3>
<pre class="brush: js notranslate">'foo' - 3 // NaN</pre>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
</tr>
<tr>
<td>{{SpecName('ESDraft', '#sec-subtraction-operator-minus', 'Subtraction operator')}}</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<p>{{Compat("javascript.operators.subtraction")}}</p>
<h2 id="See_also">See also</h2>
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Addition">Addition operator</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Division">Division operator</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Multiplication">Multiplication operator</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder">Remainder operator</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Exponentiation">Exponentiation operator</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Increment">Increment operator</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Decrement">Decrement operator</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unary_negation">Unary negation operator</a></li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Unary_plus">Unary plus operator</a></li>
</ul>
<p>
<audio class="hidden"></audio>
</p>
|
