problem with code dont know whats wrong with the syntex

[ts1000]

#include <iostream>
#include <cmath>

int main()
{
      using namespace std;
      
      int rows, columns;
      char thechar;
      cout << "how many rows: ";
      cin >> rows;
      cout << endl << "How many columns: ";
      cin >> columns;
      cout << endl << "what Symbol: ";
      cin >> thechar;
      for(int i = 0; i < rows; i++)
      {
              for (int j = 0; j < columns; j++;)
              
               cout << thechar << endl;
              
      }
      system("pause");
      return 0;
}

mainly on the line with the nested 2nd for loop
(i know iits a pointless code its for shear practice of nesting for loops)

[z05DSL3A]

the extra ; after j++

[ts1000]

thanks for some unknown reason i thought that was supposed to be there.