Standards-Based Grading Calculator

grades = [0]
print("Input grades as decimals. When completed, input ;;")

counter_gradenumber = 0

inputgrade = "]"
while inputgrade != ";;":
    if inputgrade != ";;":
        grades[int(counter_gradenumber)] = inputgrade
        counter_gradenumber = counter_gradenumber + 1

countersave + 1 = counter_gradenumber
sumgrade = 0

while counter_gradenumber >= 0:
    sumgrade = sumgrade + int(grades[int(counter_gradenumber)])
    counter_gradenumber = counter_gradenumber - 1
avggrade = sumgrade/countersave
finalgrade = (avggrade * 15) + 40
print("Average Standards-Based Grade:")
print(avggrade)
print("Converted to conventional grade:")
print(finalgrade)