When should I use const instead of let in JavaScript?
An example of an AI chatbot conversation about when to use const instead of let in JavaScript.
When should I use const instead of let in JavaScript?
You should use const when you want to declare a variable that won't be reassigned. It's a good practice for constants.
Can you give me an example of using const?
Sure! For instance, if you have a constant value like PI, you can declare it as const PI = 3.14;.
What about let? When should I use that?
Use let when you need a variable that can be reassigned, like in loops or when the value changes over time.
Is there a performance difference between const and let?
Generally, there's no significant performance difference. The choice should be based on the intended use of the variable.
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