How to generate a butterfly pattern using stars in Python
In this shot, we will discuss how to generate a butterfly pattern using stars in Python.
Numerous patterns can be printed using Python, once we have a strong grip of the concepts involving loops. Here, we will use simple for loops to generate a butterfly pattern using stars.
Description
To create a butterfly pattern using Python programming, we will use two for loops:
- First loop: It is used to form the upper two triangles (both right and left).
- Second loop: It is used to form the lower two triangles (both right and left).
Code
Let’s look at the code snippet below.
# Number of rows
r = 5
# Upper Triangles
for i in range(1, r+1):
print("*"*i, end="")
print(" "*(r-i)*2, end="")
print("*"*i)
# Lower Triangles
for i in range(r,0,-1):
print("*"*i, end="")
print(" "*(r-i)*2, end="")
print("*"*i)
Explanation
-
In line 2, we took the input for half the number of rows, i.e., half the length of the wings of the butterfly.
-
From lines 5 to 8, we created a
forloop to generate the upper triangles.- The
printstatement in line 6 generates the leftmost upper right-angled triangle. - The
printstatement in line 7 generates the spaces in between. - The
printstatement in line 8 generates the rightmost upper left-angled triangle.
- The
-
From lines 11 to 14, we created a
forloop to generate the lower triangles.- The
printstatement in line 12 generates the leftmost inverted right-angled triangle. - The
printstatement in line 13 generates the spaces in between. - The
printstatement in line 14 generates the rightmost inverted left-angled triangle.
- The
In this way, we can generate a butterfly pattern using stars in Python.
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