) and understanding that JavaScript is an interpreted, lightweight scripting language. Data Types : JavaScript uses 8 data types, including
const batchFees = [12000, 8000, 15000, 5000, 22000]; // 1. Map: Give a 10% discount on all fees const discountedFees = batchFees.map(fee => fee * 0.9); console.log(discountedFees); // [10800, 7200, 13500, 4500, 19800] // 2. Filter: Find premium courses costing more than 10,000 const premiumCourses = batchFees.filter(fee => fee > 10000); console.log(premiumCourses); // [12000, 15000, 22000] // 3. Reduce: Calculate total revenue collected from this batch const totalRevenue = batchFees.reduce((accumulator, currentFee) => accumulator + currentFee, 0); console.log(totalRevenue); // 62000 Use code with caution. 5. Functions, Objects, and Prototypes Function Expressions vs. Arrow Functions javascript notes pdf ameerpet
Understanding the scope and lifecycle of variables is a favorite interview topic in Ameerpet institutes. var let const Function Scope Block Scope Block Scope Hoisting Hoisted (Initialized as undefined ) Hoisted (Stored in Temporal Dead Zone) Hoisted (Stored in Temporal Dead Zone) Re-declaration Not Allowed Not Allowed Re-assignment Not Allowed javascript ) and understanding that JavaScript is an interpreted,
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Covers everything from foundational basics to modern ES6 features.
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Runs directly inside the user's web browser (Chrome, Firefox, Safari). The browser provides a runtime environment containing the window object, DOM document, and Web APIs.