Untitled

console.log(a); 
var a = 10;
console.log(b);
let b = 20;

let arr = [1, 2, 3, 4, 5, -6, 7];
arr.length = 0;
console.log(arr);

let f = "8";
let a = 1;
console.log((+f)+a+1);

var x = 0;
var y = 10;
if(x){
  console.log(x);
}
if(y){
  console.log(y);
}

const arr1 = [1, 2, 3, 4];
const arr2 = [6, 7, 5];
const result = [...arr1, ...arr2];
console.log(result);

const arr = ["A","B","C","D","E"]
console.log(Object.keys(arr)); 


const person1 = { name: 'xyz', age: 21 };
const person2 = { city: 'abc', ...person1 };
console.log(person2


const arr = [10, -1, 2];
arr.sort((a, b) => a - b);
console.log(arr);



console.log(5 < 6 < 7);


for (var i = 0; i < 3; i++) {
  setTimeout(() => console.log(i), 1000);
}

console.log(1 + "2" + 3);
console.log(1 + 2 + "3");

console.log(x);
var x = 5;
console.log(y);
let y = 10;

console.log([] == []); 
console.log([] == ![]);

let number = 0;
console.log(number++);
console.log(++number);
console.log(number);

var num = 8;
var num = 10;

console.log(num);


const obj = { a: 'one', b: 'two', a: 'three' };
console.log(obj);

for (let i = 1; i < 5; i++) {
  if (i === 3) continue;
  console.log(i);
}

const a = {};
const b = { key: 'b' };
const c = { key: 'c' };

a[b] = 123;
a[c] = 456;

console.log(a[b]);

const set = new Set([1, 1, 2, 3, 4]);

console.log(set);


const add = x => y => z => {
  console.log(x, y, z);
  return x + y + z;
};

let count = 0;
const nums = [0, 1, 2, 3];

nums.forEach(num => {
	if (num) count += 1
})

console.log(count)

add(4)(5)(6);