''' Purpose: remind you about string indexing.
             introduce string slicing
'''

# operator [] is the sequence index operator. Our use so far
# is to get an individual character from a string

s = input( 'Enter favorite pie: ' )

t = input( 'Enter two indices: ' )

i, j = t.split()
i, j = int( i ), int( j )

print( 's:', s )
print( 'i:', i )
print( 'j:', j )

print()

print( 's[ i ]: ', s[ i ] )
print( 's[ j ]: ', s[ j ] )

print()

# get slices of s using the slicing operator :
# NEW: SLICING
# We've seen subscripting (getting a single character in a string at the index)
# Ex. s[0]

# Slicing allows you to get MULTIPLE characters from a string at the indices
# s[i:j] will get you the characters from index i to j - 1

# s = 'hello'
#      01234
slice1 = s[ i : j ] # s[1:3] will give you 'el' (doesn't give you index 3 since we go to j-1 so index 2) so indexes 1 2
slice2 = s[ i : ] # s[1: ] will start at index i and give you everything from i onwards to the end so 'ello' so indexes 1 2 3 4
slice3 = s[ : j ] # s[ : 3] will start from the beginning and give you up to but not including index j 'hel' so indexes 0 1 2
slice4 = s[ : ] # gives you the whole thing (all indexes) 'hello' # so indexes 0 1 2 3 4

print( 's[ i : j ]:', slice1 )
print( 's[ i :   ]:', slice2 )
print( 's[   : j ]:', slice3 )
print( 's[   :   ]:', slice4 )