'''
    Purpose: introduction to dictionary'
'''

mappings = {} # initializes an empty dictionary
mappings[ 0 ] = 'even' # add a new mapping with key 0 mapping to the value 'even'
mappings[ 1 ] = 'odd'  #                            1                       'odd'
mappings[ 2 ] = 'even' #                            2                       'even'
mappings[ 3 ] = 'odd' 
mappings[ 4 ] = 'even' 
mappings[ 5 ] = 'odd' 
mappings[ 6 ] = 'even' 
mappings[ 7 ] = 'odd' 
mappings[ 8 ] = 'even' 
mappings[ 9 ] = 'odd' 
mappings[ 'even' ] = 'a number is even if its remainder divided by 2 is 0' # maps 'even' to this definition
mappings[ 'odd' ] = 'a number is odd if its remainder divided by 2 is 1' # maps 'odd' to this definition
# this example is not the best way to solve this problem, but shows the utility of heterogeneous dictionaries

reply = input( 'Enter a number: ' )
n = int( reply )

status = mappings[ n ]

print( n, status )

reply = input( 'Enter even or odd: ' )

meaning = mappings[ reply ]

print( meaning )