number triangle c++
#include <iostream>
int main() {
int n;
std::cout << "Enter the number of rows: ";
std::cin >> n;
for (int i = 1; i <= n; ++i) {
for (int j = 1; j <= i; ++j) {
std::cout << j << " ";
}
std::cout << "\n";
}
return 0;
}