BOILING_POINTS = {'Water': 100,
                  'Mercury': 357,
                  'Copper': 1187,
                  'Silver': 2193,
                  'Gold': 2660}

def instructiacons ():
    print "This outlines the program"
    print "User input required for boiling point discovery"
    print "please input a the observed boiling point of your liquid"
    print "the program will analize this and return a liquid that has a boiling point within 5%"
    print "+ or - of the expected boiling point."


def within_x_percent(reference, data, percent):
    (data <= (reference * (1 + percent/100))) and (data >= (reference * (1 - percent/100)))
    return (data <= (reference * (1 + percent/100))) and (data >= (reference * (1 - percent/100)))

instructiacons()
within_x_percent(100,98,5)