The need for "opposite of concatenation" in java

Question

I was trying to print an increasing number of stars(*)from top to bottom, something like this.
*
**
***
****
I succeed in printing the pattern with the help of concatenation. But wen i try to print the reverse of the pattern with slight modification of the code i dont succeed. Well i guess its because the opposite of concatenation don't exist in java.
https://code.sololearn.com/c9460d3qcNzt/?ref=app
https://code.sololearn.com/cA5Xr7wW8Jy8/?ref=app
Can anyone help me print the reverse of the pattern

Answer 1

You are absolutely correct in your approach.

There are just 1 typo in your code:-

• Change -= to += on line no. 10

And if you want reserve pattern, then you need something like this: https://code.sololearn.com/cQiHefZ2MS7e/?ref=app

Answer 2

Oh, I thought you wanted to print this pattern:
mmmmm
mmmm
mmm
mm
m

Answer 3

Yea thats it jan

Answer 4

You need to assign value "mmmmm" on line seven instead of empty string. Instead of using -=, you will have to use a string function. I will try to find it and then post it here.