- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Is the !! (not not) operator in JavaScript equivalent to reverse process of not operator?
<p>Yes, the not not operator is the reverse process of not operator. If any value is true then single ! (not) will return false and !! will return opposite value (true).</p><p>The not operator −</p><pre class="result notranslate">var flag=true; console.log(!flag);</pre><p>The not not operator −</p><pre class="result notranslate">var flag=true; console.log(!!flag);</pre><h2>Example</h2><p>Following is the code −</p><!---<p><a href="" target="_blank" rel="nofollow" class="demo"><i class="fa-external-link"></i> Live Demo</a></p>---><pre class="prettyprint notranslate">var flag=true; console.log("The result of single !=") console.log(!flag); console.log("The result of single !!=") console.log(!!flag)</pre><p>To run the above program, you need to use the following command −</p><pre class="result notranslate">node fileName.js. </pre><p>Here, my file name is demo247.js</p><h2>Output</h2><p>This will produce the following output on console −</p><pre class="result notranslate">PS C:\Users\Amit\javascript-code> node demo247.js The result of single != false The result of single !!= True</pre>
Updated on 09-Nov-2020 06:25:30
- Related Questions & Answers
- What is the !! (not not) operator in JavaScript?
- What is JavaScript Bitwise NOT(~) Operator?
- What is Logical NOT Operator (!) in JavaScript?
- What is Bitwise NOT Operator (~) in JavaScript?
- Double not (!!) operator in PHP
- What is the use of MySQL NOT LIKE operator?
- What is the use of MySQL IS and IS NOT operator?
- MySQL syntax not evaluating with not equal operator in presence of null?
- What is "is not" operator in Python?
- Why is operator overloading not supported by java?
- What is "not in" operator in Python?
- Is their JavaScript “not in” operator for checking object properties?
- What does 'is not' operator do in Python?
- Is there a “not equal” operator in Python?
- What is Python equivalent of the ! operator?
Advertisements