python string character at index code example

Example 1: python string indexing

str = 'codegrepper'
# str[start:end:step]
#by default: start = 0, end = len(str), step = 1
print(str[:]) 		#codegrepper
print(str[::]) 		#codegrepper
print(str[5:]) 		#repper
print(str[:8]) 		#codegrep
print(str[::2]) 	#cdgepr
print(str[2:8]) 	#degrep
print(str[2:8:2]) 	#dge
#step < 0 : reverse
print(str[::-1]) 	#reppergedoc
print(str[::-3]) 	#rpgo
# str[start:end:-1]	means start from the end, go backward and stop at start
print(str[8:3:-1]) 	#pperg

Example 2: python string indexof

s = "mouse"
animal_letter = s.find('s')
print animal_letter

Example 3: python char at

>>> s = "python"
>>> s[3]
'h'
>>> s[6]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: string index out of range
>>> s[0]
'p'
>>> s[-1]
'n'
>>> s[-6]
'p'
>>> s[-7]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: string index out of range
>>>

Example 4: how to get any letter of a string python

Random = "Whatever"#you can put anything here
words2 = Random.split(" ")
print('number of letters:')#you can delete this line...
print(len(Random))#and this one. these lines just Tell you how many 
#letters there are
while True:#you can get rid of this loop if you want
    ask = int(input("what letter do you want?"))
    print(Random[ask-1])