What is the output of the following code? function outer() { let count = 0; return function inner() { return ++count; }; } const a = outer(); const b = outer(); console.log(a(), a(), b());

JavaScript Professional Hard

JavaScript Professional — Hard

What is the output of the following code? function outer() { let count = 0; return function inner() { return ++count; }; } const a = outer(); const b = outer(); console.log(a(), a(), b());

Key points

Each call to `outer()` creates a new closure with its own `count` variable
The `inner()` function increments the `count` variable each time it is called
`a()` and `b()` have separate `count` variables due to closures
The output is determined by the order of function calls

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