Hollow Diamond Pattern

Given an integer N, print the pattern shown below.

Examples:

Input: N=5

Output:

👁 star-pattern

Input: N=3

Output:

👁 Screenshot-2026-03-10-181656

Using Nested Loops - O(n^2) Time and O(1) Space

• Iterate through 2 × n − 1 rows to form the upper and lower parts of the pattern, and compute a variable (comp) to control the spacing for each row.
• Print leading spaces using an inner loop so that the stars shift toward the center and form the desired shape.
• Use another inner loop to print stars at the first and last positions of the row and spaces in between, creating a hollow pattern.

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