make coding a program to display the output as below:

Question

output
high hill : 4
the amouny of the hill : 2
*
**
***
****
***
**
*
*
**
***
****
***
**
*

Answer 1

https://code.sololearn.com/cwDeZ2D7C8jT/?ref=app

Answer 2

Can be done with one loop, let MAX_ITTERATIONS = 'amount of the hill', let MAX_LENGTH = 'high hill'.

final int MAX_ITTERATIONS = 2,
MAX_LENGTH = 4;

int curItteration = 1,
curLength = 1,
curMaxLength = 1;

boolean moreStars = true;
do{
if(moreStars && curLength > curMaxLength)
{ // stars increasing
System.out.println();
curMaxLength++;
curLength = 1;
}
else if
(!moreStars && curLength > curMaxLength)
{ // stars decreasing
System.out.println();
curMaxLength--;
curLength = 1;
}
if(curMaxLength < 1)
{ // reset to new hill
moreStars = true;
curItteration++;
curMaxLength = 1;
curLength = 1;
continue;
}

System.out.print("*");
curLength++;

if(curLength > MAX_LENGTH) // time to decrease
moreStars = !moreStars;

}while(curItteration <= MAX_ITTERATIONS);