Build Tower

/*
Description:
Build Tower
Build Tower by the following given argument:
number of floors (integer and always greater than 0).

Tower block is represented as *

Python: return a list;
JavaScript: returns an Array;
C#: returns a string[];
PHP: returns an array;
C++: returns a vector<string>;
Haskell: returns a [String];
Ruby: returns an Array;
Have fun!

for example, a tower of 3 floors looks like below

[
  '  *  ', 
  ' *** ', 
  '*****'
]
and a tower of 6 floors looks like below

[
  '     *     ', 
  '    ***    ', 
  '   *****   ', 
  '  *******  ', 
  ' ********* ', 
  '***********'
]
Go challenge Build Tower Advanced once you have finished this :)
*/


function towerBuilder(n) {
  return [...Array(n)].map((_,i)=>" ".repeat(n-1-i)+"*".repeat(i*2+1)+" ".repeat(n-1-i))
}