grade

grade.py

import sys

def main():

    grade = input('Please enter a grade between 0-100, 999 to exit. ')

    while grade <> 999:

        validatedGrade = validate(grade)
        displayGrade(validatedGrade)
        grade = input('Please enter a grade between 0-100, 999 to exit. ')


def validate(grade):
        
    while grade < 0 or grade > 100:
        print 'ERROR: Grade must be between 0-100.'
        grade = input('Please enter a grade between 0-100, 999 to exit. ')
    else:
        print 'Thank you.'
        return grade
    
   

def displayGrade(validatedGrade):

    if validatedGrade < 60:
        print 'Fail'
    else:
        print 'Pass'

    grade = 'y'
    while True:
        grade = raw_input('Would you like to enter another grade? [y/n]')
        if grade == 'y':
            return grade
        if grade == 'n':
            print 'Okay. Thank you for using this program!'
            sys.exit()

if __name__ == '__main__': 
	main()