#0213

Centered Star Pyramid

MediumPython25 min20 XP

Problem

Return an n-row centered pyramid as a list of strings where row i has leading spaces and 2*i-1 stars.

Why This Matters

Centered patterns test whether you can derive row formulas instead of guessing output manually.

Function Signature

def centered_pyramid(n):

Examples

Example 1

Inputn = 3

Output[" *", " ***", "*****"]

Leading spaces shrink from 2 to 0 while stars grow from 1 to 5.

Constraints

Return the exact requested value.
Handle small edge cases cleanly.
Prefer readable Python over clever shortcuts.

CodePython

def centered_pyramid(n):
    """
    Input example: n = 3
    Return: ["  *", " ***", "*****"]
    For pattern problems, return a list of rows. Do not print the rows.
    """
    # write your code here
    return []

def centered_pyramid(n):
    """
    Input example: n = 3
    Return: ["  *", " ***", "*****"]
    For pattern problems, return a list of rows. Do not print the rows.
    """
    # write your code here
    return []

Visible browser tests run here when available.

Testcases1 visible / 3 hidden categories

Core example

Inputn = 3

Expected[" *", " ***", "*****"]

Leading spaces shrink from 2 to 0 while stars grow from 1 to 5.

Hidden Test Categories

small inputlarger inputedge shape