Python 3 | Program to print double sided stair-case pattern
Below mentioned is the Python 3 program to print the double-sided staircase pattern.
Examples:
Input: 10
Output:
* *
* *
* * * *
* * * *
* * * * * *
* * * * * *
* * * * * * * *
* * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
Note: This code only works for even values of n.
Example1
The given Python code demonstrates a staircase pattern. It defines a function pattern(n) that takes an integer n as input. It uses two nested loops: the outer loop iterates from 1 to n, and the inner loops handle space and star printing based on the row number and the condition of odd or even. If a row number is odd, it increments the value of k by 1; otherwise, it keeps it the same. The space and star printing is adjusted accordingly. The output is a staircase-like pattern of stars and spaces. The driver code sets n to 10 and calls the pattern function to print the pattern.
Python3
# Python3 Program to demonstrate# staircase pattern# function definitiondef pattern(n): # for loop for rows for i in range(1,n+1): # conditional operator k =i + 1 if(i % 2 != 0) else i # for loop for printing spaces for g in range(k,n): if g>=k: print(end=" ") # according to value of k carry # out further operation for j in range(0,k): if j == k - 1: print(" * ") else: print(" * ", end = " ")# Driver coden = 10pattern(n) |
Output:
* *
* *
* * * *
* * * *
* * * * * *
* * * * * *
* * * * * * * *
* * * * * * * *
* * * * * * * * * *
* * * * * * * * * *
Time Complexity: O(n2), where n represents the given input.
Auxiliary Space: O(1), no extra space is required, so it is a constant.
Example 2
Here to implement the double-sided staircase pattern we will use nested loops to control the printing of characters for each line.
Python3
def print_double_sided_staircase(height): for i in range(1, height + 1): # Print left-side steps for j in range(i): print("*", end="") # Add spacing between the two sides print(" " * (2 * height - 2 * i), end="") # Print right-side steps for j in range(i): print("*", end="") print() # Move to the next line# Get user input for the height of the staircaseheight = int(input("Enter the height of the double-sided staircase: "))print_double_sided_staircase(height) |
Output:
* *
** **
*** ***
**** ****
***** *****
************
