🔹 1. Star Patterns
🧩 Pattern 1: Right-Angled Triangle
*
* *
* * *
* * * *
* * * * *
rows = 5
for i in range(1, rows + 1):
print("* " * i)
🧩 Pattern 2: Inverted Triangle
* * * * *
* * * *
* * *
* *
*
rows = 5
for i in range(rows, 0, -1):
print("* " * i)
🧩 Pattern 3: Pyramid
*
* *
* * *
* * * *
* * * * *
rows = 5
for i in range(1, rows + 1):
print(" " * (rows - i) + "* " * i)
🧩 Pattern 4: Diamond Shape
*
* *
* * *
* * * *
* * * * *
* * * *
* * *
* *
*
rows = 5
for i in range(1, rows + 1):
print(" " * (rows - i) + "* " * i)
for i in range(rows - 1, 0, -1):
print(" " * (rows - i) + "* " * i)
🧩 Pattern 5: Hollow Pyramid
rows = 5
for i in range(1, rows + 1):
for j in range(1, rows + 1):
if j == rows - i + 1 or j == rows + i - 1 or i == rows:
print("*", end="")
else:
print(" ", end="")
print()
🔹 2. Number Patterns
🧩 Pattern 1: Increasing Triangle
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
rows = 5
for i in range(1, rows + 1):
for j in range(1, i + 1):
print(j, end=" ")
print()
🧩 Pattern 2: Repeated Number Triangle
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5
rows = 5
for i in range(1, rows + 1):
print((str(i) + " ") * i)
🧩 Pattern 3: Inverted Number Triangle
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
rows = 5
for i in range(rows, 0, -1):
for j in range(1, i + 1):
print(j, end=" ")
print()
🧩 Pattern 4: Pascal-like Number Pyramid
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
rows = 5
for i in range(1, rows + 1):
print(" " * (rows - i), end="")
for j in range(1, i + 1):
print(j, end=" ")
print()
🧩 Pattern 5: Continuous Increasing Numbers
rows = 4
num = 1
for i in range(1, rows + 1):
for j in range(i):
print(num, end=" ")
num += 1
print()
🔹 3. Alphabet (Character) Patterns
🧩 Pattern 1: Increasing Alphabet Triangle
A
A B
A B C
A B C D
A B C D E
rows = 5
for i in range(rows):
for j in range(i + 1):
print(chr(65 + j), end=" ")
print()
🧩 Pattern 2: Repeated Alphabet Triangle
A
B B
C C C
D D D D
E E E E E
rows = 5
for i in range(rows):
print((chr(65 + i) + " ") * (i + 1))
🧩 Pattern 3: Inverted Alphabet Triangle
A B C D E
A B C D
A B C
A B
A
rows = 5
for i in range(rows, 0, -1):
for j in range(i):
print(chr(65 + j), end=" ")
print()
🧩 Pattern 4: Alphabet Pyramid
A
A B
A B C
A B C D
A B C D E
rows = 5
for i in range(rows):
print(" " * (rows - i), end="")
for j in range(i + 1):
print(chr(65 + j), end=" ")
print()
🧩 Pattern 5: Continuous Alphabet Pattern
rows = 4
ch = 65
for i in range(rows):
for j in range(i + 1):
print(chr(ch), end=" ")
ch += 1
print()
✅ Summary Table
| Type | Pattern Example | Key Concept |
|---|
| ⭐ Star | Pyramid, Diamond | Loops + spaces |
| 🔢 Number | Incremental or repetitive | Nested for loops |
| 🔤 Alphabet | ASCII (chr() / ord()) | Nested loops + chr() |
✅ In short:
- Use nested loops (
for inside for) to print patterns.
- Use spaces (
" " * n) for alignment.
- Use ASCII conversion (
chr(65 + i)) for alphabet patterns.
- Combine logic + formatting for creative outputs.
