⚡ TL;DR
Print the number pyramid pattern in Python. Complete working code, expected output, algorithm explanation, and practice variations for beginners learning loops.
The Number Pyramid pattern is a classic loop exercise. Here’s the complete implementation in Python with working code and output.
Pattern to Print
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5Implementation
def number_pyramid(n):
for i in range(1, n + 1):
print(' ' * (n - i) + (str(i) + ' ') * i)
number_pyramid(5)Output
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5How It Works
Row i repeats the digit i exactly i times, centered with leading spaces.
Practice Variations
- Try printing the pattern with a different character (e.g.,
#or+) - Modify the code to accept the pattern size as user input
- Combine this pattern with its inverse to create a more complex shape
Complexity
- Time: O(n²) — the grid or line count grows quadratically
- Space: O(1) — only loop counters are needed
Related Patterns
- Number Pyramid in Dart
- Number Pyramid in Go
- Number Pyramid in Swift
- Number Triangle in Python
- Increasing Number Triangle in Python
- Decreasing Number Triangle in Python
FAQ
How do you print the Number Pyramid pattern in Python?
Use nested loops: the outer loop walks through the rows while the inner loop prints the characters or values for each row. The complete Python implementation with expected output is shown in the sections above.
What is the time complexity of the Number Pyramid pattern in Python?
The time complexity is O(n²) and the space complexity is O(1), since the pattern is built with a fixed number of loop counters and printed row by row.
Happy coding!
