Пример замыкания

example-closure.js

function makePeople(count) {
    let people = [];
    let serialNumber = 0;
    for (; serialNumber < count; serialNumber++) {
        
        let men = (num) => {
            return () => {
                debugger
            console.log(num)
        };
    }
        people.push(men(serialNumber))
    }
    return people;
}

const bombom = makePeople(10)

bombom[4]()
bombom[8]()
bombom[6]()