chapter 3 exercises

3.1 pay computation
# -*- coding: iso-8859-15 -*-

horas = int(raw_input("Enter hours:"))
precio = float(raw_input("Precio / hora"))

if horas > 40:
    extra = horas - 40
    payment = (40 * precio) + ((extra * precio) * 1.5)
else:
    payment = horas * precio

print payment



Exercise 3.2 rewrite using try & except
# -*- coding-iso-8859-15 -*-

horas = raw_input("Enter hours: ")

try:
    horas = int(horas)
    precio = float(raw_input("Precio / hora "))

    if horas > 40:
                extra = horas - 40
                payment = (40 * precio) + ((extra * precio) * 1.5)
    else:
                payment = horas * precio

    print payment


except:
    print "no es un numero"

Exercise 3.3 scores

# -*- coding: iso-8859-15 -*-

score= float(raw_input("nota? "))
grade = ""

if score > 1.0: #or < 0:
    print "Bad score"
elif score >= 0.9:
        grade = "A"
elif score >= 0.8:
        grade = "B"
elif score >= 0.7:
        grade = "C"
elif score >= 0.6:
        grade = "D"
elif score < 0.6:
        grade = "F"
print grade