Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Can someone explain to me what the plus sign is before the variables in JavaScript?
The plus(+) sign before the variables defines that the variable you are going to use is a number variable.
In the below code, there is brief description about plus sign. Following is the code −
Example
var firstValue="1000";
console.log("The data type of firstValue ="+typeof firstValues);
var secondValue=1000;
console.log("The data type of secondValue ="+typeof secondValue);
console.log("The data type of firstValue when + sign is used ="+typeof
+firstValue);
var output=+firstValue + secondValue;
console.log("Addition is="+output);To run the above program, you need to use the following command −
node fileName.js.
Output
Here, my file name is demo149.js. This will produce the following output −
PS C:\Users\Amit\JavaScript-code> node demo149.js The data type of firstValue =string The data type of secondValue =number The data type of firstValue when + sign is used =number Addition is=2000
Updated on: 11-Sep-2020
3K+ Views
Advertisements