我希望用户能够继续使用该程序。但我仍然粗略地使用 while 循环

Question

print'Free fall distance and velocity calculator'  
g=9.81
def finalvelocity(t):
    vf=g*t
    return vf
def height(t):
    h=0.5*g*t
    return h
t=input('Enter the value of time in seconds: ')
print'What do you want to get?'
print'[1]. Final Velocity'
print'[2]. Height'

choice= input('Enter Selected Number: ')

if choice==1:
    print 'Answer is', finalvelocity(t),'meter per second'

if choice==2:
    print 'Answer is', height(t), 'meters'

if choice>2:
    print 'Invalid Selection'
if choice<1:
    print 'Invalid Selection'
for choice in range(choice>2):
    n=raw_input('Do you want to continue?[y]yes/[n]no: ')


    while True:

            t=input('Enter the value of time in seconds: ')
            print'What do you want to get?'
            print'[1]. Final Velocity'
            print'[2]. Height'

            choice= input('Enter Selected Number: ')

            if choice==1:
                print 'Answer is', finalvelocity(t),'meter per second'

            if choice==2:
                print 'Answer is', height(t), 'meters'

            if choice>2:
                print 'Invalid Selection'
            if choice<1:
                print 'Invalid Selection'


    if n==n:
        break

Answer 1

感谢您更新您的问题。您可以使用无限循环一次又一次地运行程序，直到用户希望退出。一个超级简单的例子是：

while True:
    t = raw_input("Do you want to exit? y/n: ")
    if t == 'y':
        break
    else:
        print "You stayed!"

至于您的代码，您可以按照以下方式使其运行无限次。请注意，如果用户选择 'No'，代码 break 将如何退出循环以退出程序。

print 'Free fall distance and velocity calculator'
g = 9.81


def finalvelocity(t):
    vf = g*t
    return vf


def height(t):
    h = 0.5*g*t
    return h

# Start an infinite loop of user input until they exit
while True:
    # Ask for time
    t = input('Enter the value of time in seconds: ')

    # Ask for query type
    print'What do you want to get?'
    print'[1]. Final Velocity'
    print'[2]. Height'
    choice= input('Enter Selected Number: ')

    # Perform calculations
    if choice==1:
        print 'Answer is', finalvelocity(t), 'meter per second'
    if choice==2:
        print 'Answer is', height(t), 'meters'
    else:
        print 'Invalid Selection'

    # Offer the user a chance to exit
    n = raw_input('Do you want to calculate another? [y]yes/[n]no: ')
    if n == 'n':
        # User wants to exit
        break # Break out of the infinite loop

我希望用户能够继续使用该程序。但我仍然粗略地使用 while 循环

I want the User to be able to continue using the program. But Im still Sketchy using while loop

infinite-loop

while-loop

python-2.7