Question

Write the nested loops that cause the output below to print. 1 1 2 2 3 2 3 4 2 3 1 2 1

Answer 1

c++ code

#include <iostream>
using namespace std;
int main()
{
  
for(int i = 1; i <= 2; ++i) //for loop for 1st and 2nd row
{
for(int j = 1; j <= i; ++j)
{
cout << j << " ";
}
cout << "\n";
}
for(int i = 3; i <= 4; ++i) //for loop for 3rd and 4nd row
{
for(int j = 2; j <= i; ++j)
{
cout << j << " ";
}
cout << "\n";
}
for(int i = 4; i <= 4; ++i) //for loop for 5th row
{
for(int j = 2; j <= i-1; ++j)
{
cout << j << " ";
}
cout << "\n";
}
for(int i = 2; i >= 1; --i) //for loop for 6th and 7th row
{
for(int j = 1; j <=i; ++j)
{
cout << j << " ";
}
cout << endl;
}
  
return 0;
}