Write a function generatePyramid(n) that returns an array of n strings representing a centered pyramid of height n using *.
- Each row is width 2n - 1 characters.
- Row i (1-indexed) contains 2i - 1 stars, centered with spaces on both sides.
- Use loops to construct the pattern.
###Examples
Input: n = 0
Output: []
Input: n = 1
Output: ["*"]
Input: n = 3
Output:
[
" * ",
" *** ",
"*****"
]
Constraints
- n must be a finite integer >= 0.
- Return false for invalid inputs (non-integers, negatives, non-numbers, NaN, Infinity).
- Use loop-based construction (e.g., for/while).
Function Signature
function generatePyramid(n) {
// Your code here
}
Test Cases
- Base: n = 0, n = 1
- Small heights: n = 2, n = 3, n = 5
- Invalid inputs: -1, 1.5, null, undefined, '3', {}, NaN, Infinity
- Row properties: width = 2n - 1, star counts follow 2i - 1, only spaces and *
