Print a Right-Angled Star Pyramid

Medium ⏱ 12 min 57% acceptance ★★★★☆ 4.2

Write a function star_pyramid(n) that returns a list of n strings where row i (1-indexed) contains i asterisk characters ("*") with no separators, forming a left-aligned right-angled triangle.

Examples

Example 1

Input

star_pyramid(4)

Output

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

Explanation

Row i has i stars.

Constraints

n is a positive integer.

Topics

Loopsnested loopspattern printing

Companies

IBMOracle

Hints

Hint 1

Use nested loops: outer for the row, inner to build the star string, or use string multiplication `"*" * i`.

Hint 2

Append each row string to a results list.

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