C :

#include<stdio.h>
int main()
{
	int n,i,j;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		for(j=n;j>i;j--)
		{
			printf(" ");
		}
		for(j=1;j<=2*i-1;j++)
		{
			printf("*");
		}
		printf("\n");
	}
	return 0;
} 

C++ :

#include <iostream>
using namespace std;
int main()
{
	int n,i,j;
	cin>>n;
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=n-i;j++)
		{
			cout<<' ';
		}
		for(j=1;j<=2*i-1;j++)
		{
			cout<<'*';
		}
		cout<<endl;
	}
	return 0;
}

Pascal :

var
 i,j,k,x:longint;
begin
 read(x);
 for i:=1 to x do
 begin
  for j:=1 to x-i do
   write(' ');
  for k:=1 to 2*i-1 do
   write('*');
  writeln;
 end;
end.

Java :

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);
        while(in.hasNext()){
            int n=in.nextInt();
            int step=1;
            for(int j=0;j<n;j++){
                for(int k=1;k<n-j;k++){
                    System.out.print(" ");
                }
                for(int i=1;i<=2*step-1;i++){
                    System.out.print("*");
                }
                step++;
                System.out.println();
            }
        }
    }
}