Patterns In Python

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Patterns In Python

Introduction

This article shows how to draw different patterns in a Python console program.

Pattern 1

str=""
for i in range(1,6):
for j in range(1,i+1):
str=str+"*"
str=str+"\n"
print(str)

Output

Pattern 2

str=""
for i in range(6,1,-1):
for j in range(1,i):
str=str+"*"
str=str+"\n"
print(str)

Output

Pattern 3

str=""
for i in range(1,6):
for space in range(1,6-i):
str=str+" "
for j in range(1,i+1):
str=str+"*"
str=str+"\n"
print(str)

Output

Pattern 4

str=""
for i in range(6,1,-1):
for space in range(6-i,0,-1):
str=str+" "
for j in range(1,i):
str=str+"*"
str=str+"\n"
print(str)

Output

Pattern 5

rows=int(input("Enter the number of rows :"));
str=""
for i in range(1,rows+1):
for space in range(1,rows+1-i):
str=str+" "
for j in range(0,2*i-1):
str=str+"*"
str=str+"\n"
print(str)

Output

Pattern 6

for i in range(rows,0,-1):
for space in range(rows-i):
str=str+" "
for j in range(i,2*i):
str=str+"* "
for k in range(0,i-1):
str=str+"* "
str=str+"\n"
print(str)

Output

Pattern 7: The following program prints Pascal Triangle.

import math
coef = 1
rows = int(input("Enter the number of rows :"))
stringVal = ""
for i in range(rows):
for space in range(1,rows - i + 1):
stringVal = stringVal + " "
for j in range(0,i + 1):
if(i == 0 or j == 0):
coef = 1
else:
coef = coef * (i - j + 1) / j
temp = coef
TotalSpace=0
while(temp != 0):
TotalSpace = TotalSpace + 1
temp = int(math.floor(temp / 10))
p=0
while((p+TotalSpace)!=4):
stringVal = stringVal + " "
p=p+1
stringVal = stringVal + str(int(math.floor(coef)))
stringVal = stringVal + "\n"
print(stringVal)

Output:

Pattern 8: The following program prints floyd's triangle.

rows = int(input("Enter the number of rows :"))
stringVal = ""
k=0
for i in range(1,rows+1):
for j in range(1,i+1):
stringVal=stringVal+str(k+j)+" "
k=k+1;
stringVal=stringVal+"\n"
print(stringVal)

Output

Thanks!