如何使while循环在上升时不断增加

Question

int range;
int i = 1;

cout << "Enter number range:";
cin >> range;

while (i <= range){
    cout << i << endl;          
    ++i;

What I have in mind

Enter number range: 5

1

1 2

1 2 3

1 2 3 4

1 2 3 4 5

Answer 1

If you observer carefully, this will be solved using 2 loops instead of 1.

int range = 5;
    for (int i=1;i<=range;i++){
    for(int j=1;j<i+1;j++){
        cout<<j<<" ";
    }
    cout<<"\n";