function convertRowOfMatrixToString(matrix, row) {
const cols = matrix[0].length;
let result = '';
for (let j = 0; j < cols; j++) {
result += matrix[row][j].toString();
result += ' ';
}
return result.trim();
}
const matrix = [
[4, 7, 9, 18, 29, 0],
[1, 9, 18, 99, 4, 3],
[7, 18, 81, 2, 6, 5],
[19, 49, 6, 1, 9, 8],
[29, 4, 7, 9, 18, 6]
];
const row = 2;
const str = convertRowOfMatrixToString(matrix, row);
console.log(str);
/*
run:
7 18 81 2 6 5
*/