C :

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

C++ :

#include <bits/stdc++.h>
using namespace std;
int main()
{
	/* wzrhj adminpass*/
	int n,a[100][100];
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=n;j++)
		{
			a[i][j]=i;
		}
	}
		for(int i=1;i<=n;i++)
	{
			for(int j=1;j<=n;j++)
		{
			cout<<a[i][j];
		}
		cout<<endl;
	}
	return 0;
}

Pascal :

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

Java :

import java.util.*;
    public class Main{
        public static void main(String args[]){
            Scanner sc=new Scanner(System.in);
            int n=sc.nextInt();
            for(int i=1;i<=n;i++){
            	for(int j=1;j<=n;j++){
            		System.out.print(i);
            	}
            System.out.println();
            }
    }
}

Python :

n = int(input())
for i in range(1, n + 1):
    for j in range(1, n + 1):
        print(i, end='')
    print()