def is_even (num):
    ''' int -> bool
    
    retuen wether num is even. 
    >>> is_even (4)
    True
    >>> is_even (77)
    Flase
    
    '''
    return num % 2 == 00
    #if num % 2 == 0:
        #return True
    #else:
        #return False
    