// what is output?

const foo = () => {

let a = b = 10;

a++;

return a

}

foo();

console.log(a);

console.log(b);

// output

function createIncrement() {

let count = 0;

function increment() {

count++;

}

let message = `Count is ${count}`;

function log() {

console.log(message);

}

return [increment, log];

}

const [increment, log] = createIncrement();

increment();

increment();

increment();

log();

// Console sequence output?

function run () {

const promise = new Promise((resolve) => {

resolve('promise');

})

setTimeout(() => {

console.log('setTimeout');

});

promise.then(res => console.log(res))

console.log('log');

}

run();

// How does the Javascript interprets the following code?

console.log(x);

var x = 100;