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
// Doefor 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
// DoeCopyright © 2021 Codeinu
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