package main
import "fmt"
func main() {
   var i, j, row int

   // the hollow triangle that we wish to print will have 9 rows
   row = 9
   fmt.Println("Hollow Right Angled Triangle Star Pattern")

   // implementing the logic through loops
   for i = 1; i <= row; i++ {
      for j = 1; j <= i; j++ {
         if i == 1 || i == row || j == 1 || j == i {
            fmt.Printf("*")
         } else {
            fmt.Printf(" ")
         }
      }
      fmt.Println()
   }
}

Hollow Right Angled Triangle Star Pattern
*
**
* *
*  *
*   *
*    *
*     *
*      *
*********