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P05_Pattern.py

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#Author: OMKAR PATHAK

#This program prints various patterns

def pattern1(level):

'''This function prints the following pattern:

*

**

***

****

'''

for i in range(1, level + 1):

print()

for j in range(i):

print('*', end = '')

def pattern2(level):

'''This function prints the following pattern:

****

***

**

*

'''

for i in range(level, 0, -1):

print()

for j in range(i):

print('*', end = '')

def pattern3(level):

'''This function prints the following pattern:

*

**

***

****

'''

counter = level

for i in range(level + 1):

print(' ' * counter + '*' * i)

counter -= 1

def pattern4(level):

'''This function prints the following pattern:

****

***

**

*

'''

counter = 0

for i in range(level, 0 ,-1):

print(' ' * counter + '*' * i)

counter += 1

def pattern5(level):

'''This function prints the following pattern:

*

***

*****

'''

# first loop for number of lines

for i in range(level + 1):

#second loop for spaces

for j in range(level - i):

print (" ",end='')

# this loop is for printing stars

for k in range(2 * i - 1):

print("*", end='')

print()

if __name__ == '__main__':

userInput = int(input('Enter the level: '))

pattern1(userInput)

print()

pattern2(userInput)

print()

pattern3(userInput)

print()

pattern4(userInput)

print()

pattern5(userInput)

print()

def pattern6(userInput):

'''

following is the another approach to solve pattern problems with reduced time complexity

for

*

**

***

****

*****

'''

num = int(input('Enter number for pattern'))

pattern = '*'

string = pattern * num

x = 0

for i in string:

x = x + 1

print(string[0:x])