Constants in Javascript

Understanding constants and variable declarations in JavaScript is fundamental. Learn the differences between var, let, and const.

Key Concepts

• const - cannot be reassigned
• let - block scoped, can be reassigned
• var - function scoped, hoisted
• Choose the right declaration for your needs

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Example 1

Code

export const cars = [
    {
        id: 1,
        name: 'Nexon',
        brand: 'Tata',
        make: '2017'
    },
    {
        id: 1,
        name: 'Verna',
        brand: 'Hyundai',
        make: '2008'
    },
    {
        id: 1,
        name: 'Bolero',
        brand: 'Mahinda',
        make: '2012'
    }
]

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Summary

Understanding constants is essential for mastering javascript. Practice these examples and experiment with variations to deepen your understanding.

Key Takeaways

• constants is a fundamental concept in javascript
• Practice with these examples to build confidence
• Experiment with variations to explore edge cases
• Understanding constants will help you in technical interviews