C :

#include<stdio.h>
int main()
{
    int n,i,j;
    scanf("%d",&n);
    for(i=0;i<n;i++)
    {
        for(j=0;j<n;j++)printf("%d",i+1);
        printf("\n");
    }
    return 0;
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int n;
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=n;j++)
			cout<<i;
		cout<<endl;
	}
   return 0;
}

Pascal :

var n,i,j:longint;
begin
  readln(n);
  for i:=1 to n do
      begin
        for j:=1 to n do
            begin
              write(i);
            end;
        writeln;
      end;
end.