String values directly str [0], because the slice method

a = 'hellokity'

print(a[0])

h

# Take three substrings to 8 characters, left closed right open 
# print (a [2:. 8]) 
# print (a [2:. 8: 2]) # every two take a 
# print (a [ 2:]) taken to the end # 
# print (a [: 8] ) # taken from the head 
# print (a [:]) # taken from the beginning to the end 
# print (a [:: 2] ) # interval from start to finish a take one step is 2 
# Print (a [: -. 1]) from the head to the penultimate # 
# print (a [1:] ) # taken from the second to the last 
# print (a [:: - 1]) # counting down, taken from the first string ,, a countdown to the first reverse