CODEWITHSUNDEEP
pythonpython-3.x
crccc
crccc

Reputation: 13

Use enter in python 3

I'm writing for creating a list of number from input and get the average of the list. The requirement is: when the user enters a number, the number will be appended to the list; when the user press Enter, the input section will stop and conduct and calculation section. Here is my code:

n = (input("please input a number"))
numlist = []

while n != '':
    numlist.append(float(n))
    n = float(input("please input a number"))

    N = 0
    Sum = 0
    for c in numlist:
        N = N+1
        Sum = Sum+c

Ave = Sum/N
print("there are",N,"numbers","the average is",Ave)

if I enter numbers, everything works fine. But when I press Enter, it shows ValueError. I know the problem is with float(). How can I solve this?

Upvotes: 0

Views: 130

Answers (2)

nsr
nsr

Reputation: 895

this should solve ur prob ,by adding a try,catch block around ur print statement

n = (input("please input a number"))
numlist = []

while True :
    numlist.append(float(n))
    #####cath the exception and break out of 
    try :
        n = float(input("please input a number"))
    except ValueError :
        break


N = 0
Sum = 0
for c in numlist:
    N = N+1
    Sum = Sum+c



Ave = Sum/N
print("there are",N,"numbers","the average is",Ave)

Upvotes: -1

tjohnson
tjohnson

Reputation: 1077

You don't need the float() around the input() function inside your loop because you call float() when you append n to numlist.

Upvotes: 2

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