# useReducer

const ACTIONS = {
    INCREMENT:'inc',
    DECREMENT:'dec'
}
const reducer = (state, action) => {
    if(action.type === ACTIONS.INCREMENT){
        return state + 1
    }else if(action.type === ACTIONS.DECREMENT){
        return state - 1 
    }
    return state;
};
const [state , dispatch] = useReducer(reducer , inatialState = 0)