Python programming language is quite easy to learn. The implementation of various libraries with the ease of syntax makes it stand out, one of the many reasons why it has become the most popular programming language in this decade. While the learning part is easy, the interviewers often seek your approach in building the logic for pattern programs. As tricky as it may sound, with python it is a piece of cake. In this article, we will learn about various pattern programs in python. The following topics are covered in this blog:
The pattern programs incorporate a lot of nested loops. So if you are not familiar with loops in python, make sure to check out the detailed tutorial on loops in python.
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Star Pattern Programs
Following are a few star pattern programs in python.
Pyramid Pattern Program
def pattern(n):
k = 2 * n - 2
for i in range(0,n):
for j in range(0,k):
print(end=" ")
k = k - 1
for j in range(0, i+1):
print("*", end=" ")
print("&#92r")
pattern(5)
Output: 
Reverse Pyramid Pattern Program
def pattern(n):
k = 2*n -2
for i in range(n,-1,-1):
for j in range(k,0,-1):
print(end=" ")
k = k +1
for j in range(0, i+1):
print("*", end=" ")
print("&#92r")
pattern(5)
Output:
Right Start Pattern Program
def pattern(n):
for i in range(0, n):
for j in range(0, i + 1):
print("* ", end="")
print("&#92r")
for i in range(n, 0 , -1):
for j in range(0, i + 1):
print("* ", end="")
print("&#92r")
pattern(5)
Output:
Left Start Pattern Program
def pattern(n):
k = 2 * n - 2
for i in range(0, n-1):
for j in range(0, k):
print(end=" ")
k = k - 2
for j in range(0, i + 1):
print("* ", end="")
print("&#92r")
k = -1
for i in range(n-1,-1,-1):
for j in range(k,-1,-1):
print(end=" ")
k = k + 2
for j in range(0, i + 1):
print("* ", end="")
print("&#92r")
pattern(5)
Output: 
Hourglass Pattern Program
def pattern(n):
k = n - 2
for i in range(n, -1 , -1):
for j in range(k , 0 , -1):
print(end=" ")
k = k + 1
for j in range(0, i+1):
print("* " , end="")
print("&#92r")
k = 2 * n - 2
for i in range(0 , n+1):
for j in range(0 , k):
print(end="")
k = k - 1
for j in range(0, i + 1):
print("* ", end="")
print("&#92r")
pattern(5)
Output: 
Half-Pyramid Pattern Program
def pattern(n):
for i in range(0,n):
for j in range(0, i+1):
print("* " , end="")
print("&#92r")
pattern(5)
Output: 
Left Half-Pyramid Pattern Program
def pattern(n):
k = 2 * n - 2
for i in range(0, n):
for j in range(0, k):
print(end=" ")
k = k - 2
for j in range(0, i + 1):
print("* ", end="")
print("&#92r")
pattern(5)
Output: 
Downward Half-Pyramid Pattern Program
def pattern(n):
for i in range(n, -1, -1):
for j in range(0, i + 1):
print("* ", end="")
print("&#92r")
pattern(5)
Output: 
Diamond Shaped Pattern Program
def pattern(n):
k = 2 * n - 2
for i in range(0, n):
for j in range(0 , k):
print(end=" ")
k = k - 1
for j in range(0 , i + 1 ):
print("* ", end="")
print("&#92r")
k = n - 2
for i in range(n , -1, -1):
for j in range(k , 0 , -1):
print(end=" ")
k = k + 1
for j in range(0 , i + 1):
print("* ", end="")
print("&#92r")
pattern(5)
Output: 
Diamond Star Pattern Program
for i in range(5):
for j in range(5):
if i + j == 2 or i - j == 2 or i + j == 6 or j - i == 2:
print("*", end="")
else:
print(end=" ")
print()
Output:
Number Pattern Programs
Here are a few programs with numeric patterns in java.
Simple Numbers Program
def pattern(n):
x = 0
for i in range(0 , n):
x += 1
for j in range(0, i + 1):
print(x , end=" ")
print("\r")
pattern(5)Output:
Pascal’s Triangle Program
def pascal(n):
for i in range(0, n):
for j in range(0, i + 1):
print(function(i, j)," ", end="")
print()
def function(n, k):
res = 1
if (k > n - k):
k = n - k
for i in range(0, k):
res = res * (n - i)
res = res // (i + 1)
return res
pascal(7)
Output:
Half-Pyramid Pattern With Numbers
def pattern(n):
for i in range(1, n):
for j in range(1, i + 1):
print(j, end= " ")
print("&#92r")
pattern(5)
Output:
Diamond Pattern With Numbers
def pattern(n):
k = 2 * n - 2
x = 0
for i in range(0, n):
x += 1
for j in range(0, k):
print(end=" ")
k = k - 1
for j in range(0, i + 1):
print(x, end=" ")
print("&#92r")
k = n - 2
x = n + 2
for i in range(n, -1, -1):
x -= 1
for j in range(k, 0, -1):
print(end=" ")
k = k + 1
for j in range(0, i + 1):
print(x, end=" ")
print("&#92r")
pattern(5)
Output:
Descending Order Pattern Program
def pattern(n):
for i in range(n, 0, -1):
for j in range(1, i + 1):
print(j, end=" ")
print("&#92r")
pattern(5)
Output:
Binary Numbers Pattern Program
def pattern(n):
k = 2 * n - 2
for i in range(0, n):
for j in range(0, k):
print(end=" ")
k = k - 1
for j in range(0, i + 1):
print('10', end="")
print("&#92r")
pattern(5)
Output:
Characters Pattern Programs
Here are a few pattern programs in python with characters.
Right Alphabetical Triangle
def pattern(n):
x = 65
for i in range(0, n):
ch = chr(x)
x += 1
for j in range(0, i + 1):
print(ch, end=" ")
print("&#92r")
pattern(5)
Output:
Character Pattern Program
def pattern(n):
k = 2 * n - 2
x = 65
for i in range(0, n):
for j in range(0, k):
print(end=" ")
k = k - 1
for j in range(0, i + 1):
ch = chr(x)
print(ch, end=" ")
x += 1
print("&#92r")
pattern(7)
Output:
K Shape Character Program
for i in range(7):
for j in range(7):
if j == 0 or i - j == 3 or i + j == 3:
print("*", end="")
else:
print(end=" ")
print()
Output:
Triangle Character Pattern Program
def pattern(n):
k = 2 * n - 2
x = 65
for i in range(0, n):
ch = chr(x)
x += 1
for j in range(0, k):
print(end=" ")
k = k - 1
for j in range(0, i + 1):
print(ch, end=" ")
print("&#92r")
pattern(5)
Output:
Diamond Shaped Character Pattern Program
def pattern(n):
k = 2 * n - 2
for i in range(0, n):
for j in range(0, k):
print(end=" ")
k = k - 1
x = 65
for j in range(0, i + 1):
ch = chr(x)
print(ch, end=" ")
x += 1
print("&#92r")
k = n - 2
x = 65
for i in range(n, -1, -1):
for j in range(k, 0, -1):
print(end=" ")
k = k + 1
for j in range(0, i + 1):
ch = chr(x)
print(ch, end=" ")
x += 1
print("&#92r")
pattern(5)
Output:
This brings us to the end of this article where we have learned how we can implement different patterns in python using asterisk, numbers and characters with the help of loops in python. I hope you are clear with all that has been shared with you in this tutorial.
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