Python Code Example: christmas tree pattern

This Python code snippet generates a pattern that involves stars (`*`) and vertical bars (`|`). The pattern is a combination of right-aligned stars followed by vertical bars, resembling a right triangle shape.

Code Example

``````n = 10

for i in range(0, n):
for j in range(1, n - i):
print(" ", end="")
print("*", end="")
for k in range(0, i):
print("|", end="")
for j in range(1, i):
print("|", end="")
if i > 0:
print("*", end="")
print()``````

Output

``````         *
*|*
*|||*
*|||||*
*|||||||*
*|||||||||*
*|||||||||||*
*|||||||||||||*
*|||||||||||||||*
*|||||||||||||||||*``````

Code Explanation

Initial Setup

``n = 10``
• A variable `n` is initialized with the value `10`. This determines the height of the pattern.
• Outer Loop (`for i in range(0, n)`):
• This loop runs from `i = 0` to `i = 9`. It controls the rows of the pattern.
• First Inner Loop (`for j in range(1, n - i)`):
• For each value of `i`, this loop runs from `j = 1` to `j < n - i`. It prints spaces to ensure the star (`*`) is right-aligned.
• Print Star (`print("*", end="")`):
• After printing the spaces, this statement prints a star (`*`), staying on the same line.
• Second Inner Loop (`for k in range(0, i)`):
• For each value of `i`, this loop runs from `k = 0` to `k < i`. It prints vertical bars (`|`) immediately after the first star.
• Third Inner Loop (`for j in range(1, i)`):
• This loop runs from `j = 1` to `j < i`. It prints additional vertical bars (`|`) after the ones printed by the second inner loop. This results in `i - 1` additional vertical bars.
• Conditional Print Star (`if i > 0: print("*", end="")`):
• If `i` is greater than `0`, an additional star (`*`) is printed at the end of the vertical bars.
• New Line (`print()`):
• This statement moves the cursor to the next line after completing all prints in the current row.