react

1. React.useState() retunrs Array. const state = React.useState() The value of state[0] is undefined.2. Plus, The value of state[1] is Function.3. With this,const [a, b, _, c] = [1, 2, 3, 4, 5, 6, 7, 8]; the value of c is 4. 4. With this,const [n, setN] = React.useState();When we call setN(1), the value of 'n' changes to 1 and the component is rendered again.5. With this,const [n, setN] = React...