def sluu99(n):
 if (n < 0):
  n = (n * (-1))
 while (n > 0):
  n = (n - 2)
 return (n == 0)

def sluu99 ( n ) : if ( n < 0 ) : n = ( n * ( - 1 ) ) while ( n > 0 ) : n = ( n - 2 ) return ( n == 0 )
this function checks if a number is odd or even .