Top 5 modern JavaScript features you should learn in 2021

Hello guys, if you are wondering what to learn in JavaScript to take your skills to the next level, then you have come to the right place. Earlier, I have shared the best Javascript courses and books. In this article, I will share essential modern Javascript features like arrow functions, let and const keywords, restructuring, spread operator, etc., to learn in 2021. JavaScript is the most popular and widely used programming language in the world. Over 90% of the websites use JavaScript in one way or other. 

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Why use Underscore in Numbers from Java? Underscore in Numeric Literals Example

JDK 1.7 release had introduced several useful features, despite most of them being syntactic sugar, there use can greatly improve readability and code quality. One such feature is the introduction of underscores in numeric literals . From Java 7 onwards you can write a long digit e.g. 10000000000 to a more readable 1 0_000_000_000 in your Java source code. One of the most important reasons for using an underscore in numeric literal is avoiding subtle mistakes that are hard to figure out by looking at code. It's hard to notice a missing zero or extra zero between 10000000000 and 1000000000 , than 10_000_000_000 and 1_000_000_000 .
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