What is the difference between andquot;varandquot; and andquot;letandquot; when it comes to variable hoisting?a)andquot;varandquot; variables are hoisted to the top of the function, while andquot;letandquot; variables are hoisted to the top of the block.b)andquot;varandquot; variables are hoisted to the top of the block, while andquot;letandquot; variables are hoisted to the top of the function.c)Both andquot;varandquot; and andquot;letandquot; variables are hoisted to the top of their respective scopes.d)andquot;varandquot; variables are not hoisted, while andquot;letandquot; variables are hoisted to the top of the block.Correct answer is option 'A'. Can you explain this answer?

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What is the difference between "var" and "let" when it comes to variable hoisting?

a)
"var" variables are hoisted to the top of the function, while "let" variables are hoisted to the top of the block.
b)
"var" variables are hoisted to the top of the block, while "let" variables are hoisted to the top of the function.
c)
Both "var" and "let" variables are hoisted to the top of their respective scopes.
d)
"var" variables are not hoisted, while "let" variables are hoisted to the top of the block.

Correct answer is option 'A'. Can you explain this answer?

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What is the difference between "var" and "let" whe...

The behavior of variable hoisting differs between "var" and "let" declarations in JavaScript.

Hoisting with "var": When a variable is declared using the "var" keyword, its declaration is hoisted to the top of the nearest function scope. This means that the variable declaration is moved to the top of its containing function, regardless of where it appears in the code. However, the assignment or initialization of the variable remains in its original position.

Example:
function example() {
console.log(x); // Output: undefined
var x = 5;
}
In the above code, even though the variable x is accessed before its declaration, the declaration is hoisted to the top of the function scope. This is why the output of console.log(x) is undefined instead of throwing a ReferenceError. Hoisting with "let": When a variable is declared using the "let" keyword, its declaration is hoisted to the top of the nearest block scope (inside curly braces {}). This means that the variable declaration is moved to the top of the block in which it appears, regardless of its position within the block. Similar to "var" variables, the assignment or initialization of the variable remains in its original position.
Example:
function example() {
console.log(x); // Throws ReferenceError: Cannot access 'x' before initialization
let x = 5;
}
In the above code, accessing the variable x before its declaration throws a ReferenceError. Unlike "var" variables, "let" variables are not accessible before their declaration within the block scope.

To summarize, "var" variables are hoisted to the top of the function scope, while "let" variables are hoisted to the top of the block scope. Understanding these differences is crucial for managing variable visibility and preventing unintended behavior in JavaScript code.

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What is the difference between "var" and "let" when it comes to variable hoisting?a)"var" variables are hoisted to the top of the function, while "let" variables are hoisted to the top of the block.b)"var" variables are hoisted to the top of the block, while "let" variables are hoisted to the top of the function.c)Both "var" and "let" variables are hoisted to the top of their respective scopes.d)"var" variables are not hoisted, while "let" variables are hoisted to the top of the block.Correct answer is option 'A'. Can you explain this answer?

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