function flattenMatrix(matrix) {
return matrix.flat().join('');
}
function main() {
const matrix = [
['H', 'e', 'l', 'l', 'o'],
[' ', 'W', 'o', 'r', 'l', 'd'],
['!']
];
const output = flattenMatrix(matrix);
console.log("Flattened string:", output);
}
main();
/*
run:
Flattened string: Hello World!
*/