JavaScript Operator: logical NOT
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In JavaScript,
the ! operator is
the logical (i.e. Boolean) NOT operator:
x
|
!x
|
true
|
false
|
false
|
true
|
EXAMPLE:
HTML USED IN THIS EXAMPLE:
<!DOCTYPE html>
<html> <!-- Copyright (c) Nematrian Limited 2018 -->
<head>
<style>table,th,tr,td {border: 1px solid black;
border-collapse: collapse;}</style>
</head>
<body>
<table>
<tr>
<th>x</th><th>!x</th>
</tr>
<tr>
<td><code>true</code></td><td><code id="TrueX"></code></td>
</tr>
<tr>
<td><code>false</code></td><td><code id="FalseX"></code></td>
</tr>
<tr>
</table>
<script>
document.getElementById("TrueX").innerHTML = ! true;
document.getElementById("FalseX").innerHTML = ! false;
</script>
</body>
</html>
|
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