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// 创建一个二维数组，该函数接收三个参数：要创建的二维数组的行数，要创建的二维数组的列数，要创建的二维数组的初始值
function twoDimensionalArray(numRows, numCols, initial) {
    let arr = [];
    for (let index = 0; index < numRows; index++) {
        let col = [];
        for (let i = 0; i < numCols; i++) {
            col[i] = initial;
        }
        arr[index] = col;
    }
    return arr;
}