char = '*' 
number = int(input("Enter a number:")) 
for row in range(number):  
 for col in range(row+1):   
  print(char, end='')  
 print()

<?php
$number=5; //GET ile veri alınabilir.
$ch="*";
   for($i=0;$i<$number;$i++) 
   {
      for($j=0;$j<$i+1;$j++) 
      { print $ch;}
   print "<br>"; 
   } 
?>

#include <iostream>
using namespace std;

int main()
{
int number=0;
cout<<"Enter a number:";
cin>>number;
string ch="*";
    for(int i=0;i<number;i++) 
   {
     for(int j=0;j<i+1;j++) 
     { cout<<ch;}
   cout<<"\n"; 
   }
return 0;
}

class yildiz {
public static void main(String[] args) {
String ch = "*";
int number = Integer.parseInt(args[0]); //Konsoldan veri girisi
  for(int i=0;i<number;i++) 
  {
    for(int j=0;j<i+1;j++) 
    { System.out.print(ch);}
  System.out.println(""); 
  }
}
}