iterate object javascript

1let obj = {
2	key1: "value1",
3	key2: "value2",
4	key3: "value3",
5	key4: "value4",
6}
7Object.entries(obj).forEach(([key, value]) => {
8	console.log(key, value);
9});

1var person={
2 	first_name:"johnny",
3  	last_name: "johnson",
4	phone:"703-3424-1111"
5};
6for (var property in person) {
7  	console.log(property,":",person[property]);
8}

1Object.entries(obj).forEach(([key, value]) => {
2	console.log(key, value);
3});

1let person={
2 	first_name:"johnny",
3  	last_name: "johnson",
4	phone:"703-3424-1111"
5};
6for (let i in person) {
7  let t = person[i]
8  	console.log(i,":",t);
9}

1const object1 = {
2  a: 'somestring',
3  b: 42
4};
5for (let [key, value] of Object.entries(object1)) {
6  console.log(`${key}: ${value}`);
7}
8// expected output:
9// "a: somestring"
10// "b: 42"
11// order is not guaranteed

1const object = {a: 1, b: 2, c: 3};
2
3for (const property in object) {
4  console.log(`${property}: ${object[property]}`);
5}