javascript key in for loop code example

Example 1: how to get value and key in a for of loop in js

const test = {a: 1, b: 2, c: 3};

for (const [key, value] of Object.entries(test)) {
  console.log(key, value);
}

Example 2: for in loop key

// if you want to get the 'value' of the key  you can do it this way
const user = {firstName: 'John', lastName: 'Doe'}

for(key in user) console.log(user[key]);
// output : 
// John
// Doe