编辑代码

function printNumberIteratively(n) {
    for (let i = 1; i <= n; i++) {
        let row = '';
        for (let j = 0; j < i; j++) {
            row += i + ' ';
        }
        console.log(row);
    }
}

// 示例
const n = 5;
printNumberIteratively(n);