Why using let instead of const? #11351
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Hello, The choice between using let and const in JavaScript depends on the desired behavior and requirements of the variables in your code. The main difference between let and const lies in their mutability. let: Variables declared with let are mutable, which means their values can be reassigned. This is useful when you need to update or change the value of a variable during the execution of your program. const: Variables declared with const are constants, meaning their values PrepaidGiftBalance Visa cannot be reassigned once they are initialized. They provide immutability, which can help prevent accidental reassignments and introduce more predictable code. So, the choice between let and const depends on whether you need the variable to be mutable or constant. If a variable's value needs to change over time, you would use let. If the value should remain constant and not be changed, you would use const to enforce that immutability. It's important to note that the use of let or const is not necessarily related to performance. Both keywords have similar performance characteristics, and choosing one over the other does not significantly impact the execution speed of your code. The choice is primarily based on the intended behavior and design of your program. |
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Just personal preference, less typing 😊 |
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I saw the source code and see most of the time it use let instead of const.
I just wondering is there any reason? (for example better performance) or its just a personal preference?
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