How To Print A Triangle In Java Using For Loop

hello guys , i remember what kind of homeworks in java students get at the start so i started to post solutions in this even i had to do this when i was doing java (a diploma) our sir asked us to make a program that prints out a triangle using For Loops so i created my own answer but my sir showed us a different one it doesn't even looks like a triangle but it has the triangle shape but mine is exactly a triangle .

this is my answer , NOTE : the easiest and the best way to print a real triangle