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1. Print Right Triangle Pattern2. Print Inverted Right Triangle3. Print Pyramid Pattern4. Number Pattern 15. Number Pattern 26. Character Pattern7. Print Hollow Square8. Print Diamond Pattern9. Number Pyramid10. Floyd Triangle11. Diamond Pattern12. Number Pyramid13. Hollow Square Pattern

Print Hollow Square

Print hollow square pattern.

IntermediatePhase 2 - Level 4: Pattern PrintingExample 7 of 13
print-hollow-square.py
1# Take n
2n = int(input("Enter size: "))
3

4# Print hollow square
5for i in range(n):
6    for j in range(n):
7        if i == 0 or i == n-1 or j == 0 or j == n-1:
8            print("*", end="")
9        else:
10            print(" ", end="")
11    print()

Output

Enter size: 5
*****
*   *
*   *
*   *
*****

What's going on

Print stars only on borders.

Key Concepts:

First row, last row: all stars
First column, last column: stars
Middle: spaces

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