# concatenating strings just means combining strings together
# it is used to add one string to the end of another
# below are two exmaples of how concatenation can be used
# to output 'Hello World':
# example 1:
hello_world = "Hello" + " World"
print(hello_world)
>>> Hello World
# example 2:
hello = "Hello"
print(hello + " World")
>>> Hello World# Basic Functions
len('turtle') # 6
# Basic Methods
' I am alone '.strip() # 'I am alone' --> Strips all whitespace characters from both ends.
'On an island'.strip('d') # 'On an islan' --> # Strips all passed characters from both ends.
'but life is good!'.split() # ['but', 'life', 'is', 'good!']
'Help me'.replace('me', 'you') # 'Help you' --> Replaces first with second param
'Need to make fire'.startswith('Need')# True
'and cook rice'.endswith('rice') # True
'bye bye'.index('e') # 2
'still there?'.upper() # STILL THERE?
'HELLO?!'.lower() # hello?!
'ok, I am done.'.capitalize() # 'Ok, I am done.'
'oh hi there'.find('i') # 4 --> returns the starting index position of the first occurrence
'oh hi there'.count('e') # 2type('Hellloooooo') # str
'I\'m thirsty'
"I'm thirsty"
"\n" # new line
"\t" # adds a tab
'Hey you!'[4] # y
name = 'Andrei Neagoie'
name[4] # e
name[:] # Andrei Neagoie
name[1:] # ndrei Neagoie
name[:1] # A
name[-1] # e
name[::1] # Andrei Neagoie
name[::-1] # eiogaeN ierdnA
name[0:10:2]# Ade e
# : is called slicing and has the format [ start : end : step ]
'Hi there ' + 'Timmy' # 'Hi there Timmy' --> This is called string concatenation
'*'*10 # **********# Python String Operations
str1 = 'Hello'
str2 ='World!'
# using +
print('str1 + str2 = ', str1 + str2)
# using *
print('str1 * 3 =', str1 * 3)#Strings in python are surrounded by either single quotation marks, or double quotation marks.
print("This is a string")
print('i am also a string')string = 'amaama'
half = int(len(string) / 2)
if len(string) % 2 == 0: # even
first_str = string[:half]
second_str = string[half:]
else: # odd
first_str = string[:half]
second_str = string[half+1:]
# symmetric
if first_str == second_str:
print(string, 'string is symmertical')
else:
print(string, 'string is not symmertical')
# palindrome
if first_str == second_str[::-1]: # ''.join(reversed(second_str)) [slower]
print(string, 'string is palindrome')
else:
print(string, 'string is not palindrome')