python string indexing

1str = 'codegrepper'
2# str[start:end:step]
3#by default: start = 0, end = len(str), step = 1
4print(str[:]) 		#codegrepper
5print(str[::]) 		#codegrepper
6print(str[5:]) 		#repper
7print(str[:8]) 		#codegrep
8print(str[::2]) 	#cdgepr
9print(str[2:8]) 	#degrep
10print(str[2:8:2]) 	#dge
11#step < 0 : reverse
12print(str[::-1]) 	#reppergedoc
13print(str[::-3]) 	#rpgo
14# str[start:end:-1]	means start from the end, go backward and stop at start
15print(str[8:3:-1]) 	#pperg

1my_string = "Hey, This is a sample text"
2print(my_string[2:]) #prints y, This is a sample text
3print(my_string[2:7]) #prints y, Th excluding the last index
4print(my_string[2::2]) #prints y hsi  apetx
5print(my_string[::-1]) #reverses the string => txet elpmas a si sihT ,yeH

1# Start from zero and the return value is exact index of first letter

1sentence = 'Python programming is fun.'
2
3result = sentence.index('is fun')
4print("Substring 'is fun':", result)
5
6result = sentence.index('Java')
7print("Substring 'Java':", result)