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Javascript Syntax Development Tutorials, Guides & Insights

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Variables and Constants

Tutorial December 10, 2024
javascript

     const API_KEY = "12345";
     // API_KEY = "67890"; // Error: Assignment to constant variable
  • Variables are accessible only within the block they are declared in.
  • Example:

Hello World and Comments

Tutorial December 10, 2024
javascript

       node hello.js
  • The output will be: