C++ :

#include <bits/stdc++.h>
using namespace std;


int main(){
	int n;
	int i,j;
	cin>>n;
	for(i = 1;i <= n;i++){
		for(j = 1;j <= i - 1;j++){
			cout<<" ";
		}
		
		for(j = 1;j <= n - i + 1;j++){
			cout<<j;
		}
		
		cout<<endl;
	}
}

Pascal :

program liumohan;
var n,i,j,x:longint;
begin
  read(n);
  x:=-1;
  for i:=n downto 1 do
  begin
  x:=x+1;
  for j:=1 to x do write(' ');
    for j:=1 to i do write(j);
    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<i;j++){
            		System.out.print(" ");
            	}
            	for(int z=1;z<=n-i+1;z++){
            		System.out.print(z+"");
            	}
            System.out.println();
            }
    }
}

Python :

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