What is the difference between let and const in JavaScript?
An example of an AI chatbot conversation about the scope of let and const in JavaScript.
What is the difference between let and const in JavaScript?
In JavaScript, 'let' allows you to declare variables that can be reassigned, while 'const' is for variables that cannot be reassigned after their initial assignment.
Can you explain the scope of let and const?
Sure! Both 'let' and 'const' have block scope, meaning they are only accessible within the block they are defined in, unlike 'var' which has function scope.
What happens if I try to reassign a const variable?
If you try to reassign a 'const' variable, JavaScript will throw a TypeError, indicating that you cannot reassign a constant variable.
Are there any exceptions to the const rule?
Yes, while you can't reassign a 'const' variable, if it's an object or array, you can still modify its properties or elements.
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