published: 13 Feb 2023
5 min read
Use const and let instead of var when declaring variables. The var keyword has some quirky behavior when it comes to variable hoisting and scoping, which can lead to unexpected results. In contrast, const and let have well-defined and intuitive scoping rules that make your code easier to understand and maintain.
When you use const, the value of the variable cannot be reassigned. On the other hand, let allows you to change the value of the variable within the scope in which it was declared. These two keywords help to avoid potential bugs and make your code more readable.
In conclusion, using const and let instead of var is a simple yet effective way to improve the quality of your JavaScript code.
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Use const and let instead of var when declaring variables. The var keyword has some quirky behavior when it comes to variable hoisting and scoping, which can lead to unexpected results. In contrast, const and let have well-defined and intuitive scoping rules that make your code easier to understand and maintain.
When you use const, the value of the variable cannot be reassigned. On the other hand, let allows you to change the value of the variable within the scope in which it was declared. These two keywords help to avoid potential bugs and make your code more readable.
In conclusion, using const and let instead of var is a simple yet effective way to improve the quality of your JavaScript code.
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