[Beginner] Code is not producing desired result

[fakej171]

1. How to define range 1 to infinity in function range()?
2. Am I using for-else loop correctly?
3. Also even if I enter everything correctly following is the result:

Your age in 1 will be: 1

Thanks

print('\nThis is a program to detemine your age in any year.\n')
currentAge = currentYear = futureAge = futureYear = 0

currentAge = int(input('\nEnter your current age in years: '))

for currentAge in range(1,95):
    break

else:
    currentAge = int(input('\nEnter your real age (1 - 95): '))


currentYear = int(input('\nEnter current year: '))

for currentYear in range(1, 9999999):
    break

else:
    currentYear = int(input('Please enter valid year: '))


futureYear = int(input('\nEnter the year to determine your age in that year: '))

for futureYear in range(1, 9999999):
    break

else:
    futureYear = int(input('Please enter valid year: '))

futureAge = currentAge + (futureYear - currentYear)

if futureAge > 0:

    if futureAge > 95 and futureYear > currentYear:
        print('\nYour age in', futureYear, 'will be:', futureAge)
        print('\nAre you sure you are going to be alive by then!')

    elif futureYear < currentYear:
        print('\nYour age in', futureYear, 'was:', futureAge)

    else:
        print('\nYour age in', futureYear, 'will be:', futureAge)

else:
    print('\nYou weren\'t alive in', futureYear, ".")