无法正确访问内部函数

function outerFunction() {
    function innerFunction() {
        console.log("Inner function called");
    }
    return innerFunction;
}

const innerFunc = outerFunction();
innerFunc(); // 输出: Inner function called

function createFunctions() {
    const arr = [];
    for (let i = 0; i < 3; i++) {
        arr.push(function() {
            console.log(i);
        });
    }
    return arr;
}

const functions = createFunctions();
functions[0](); // 输出: 3
functions[1](); // 输出: 3
functions[2](); // 输出: 3

function createFunctions() {
    const arr = [];
    for (let i = 0; i < 3; i++) {
        arr.push((function(i) {
            return function() {
                console.log(i);
            };
        })(i));
    }
    return arr;
}

const functions = createFunctions();
functions[0](); // 输出: 0
functions[1](); // 输出: 1
functions[2](); // 输出: 2