Positive and negative numbers

Question

def main():
i = int( input ("Enter an interger, the input ends if it is 0: "))
count_pos = 0
count_neg = 0
total = 0
if (i != 0):
    while (i != 0):
        if (i > 0):
            count_pos += 1
        elif (i < 0):
            count_neg += 1
        total += i
    i = int( input ("Enter an interger, the input ends if it is 0: "))
    count = count_pos + count_neg

print ("The number of positives is", count_pos)
print ("The number of negatives is", count_neg)
print ("The total is", total)

File "", line 16 print ("The number of positives is", count_pos) ^ IndentationError: unindent does not match any outer indentation level

Please fix the indentation. It's difficult to debug code that doesn't run, or worse, runs differently than it's supposed to. — Aran-Fey, Dec 20 '14 at 13:53
@wqiejwqdjoiwqdwqewqewq: The code you posted isn't runnable. It'll crash with a `SyntaxError`. And I think a few lines of code aren't correctly indented - is `average = total / count` really inside your `while (i != 0):` loop? — Aran-Fey, Dec 20 '14 at 13:58

ZdaR · Accepted Answer · 2014-12-20T14:34:10.957

0

See let's take a list , say sample_list

sample_list = [1, 5, -9, 6, 7, -7, -2, -4, 2, 3]

Or

sample_list = []
while True:
    a = int(raw_input())
    if a==0: break
    else:sample_list.append(a)

Now, To get the length of list

sample_list_length = len(sample_list)

where len() is a inbuilt function which returns the length of any iterable object like strings,lists,etc.

positive_number = 0
negative_number = 0
for dummy_number in sample_list:
    if dummy_number>=0:
        positive_number+=1
    else:
        negative_number+=1

print "There are",positive_number,"positive numbers"
print "There are",negative_number,"negative numbers"
print "There are",sample_list_length,"total numbers"

edited Dec 20 '14 at 14:34

answered Dec 20 '14 at 14:10

ZdaR

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But if you want the user to enter the number to the list then see the edit – ZdaR Dec 20 '14 at 14:16
Sorry for keep you waiting @wqiejwqdjoiwqdwqewqewq – ZdaR Dec 20 '14 at 14:34

score 0 · Answer 2 · answered Dec 20 '14 at 14:13

There are a couple of problems with your code.

First of all,

while (i != 0):
    if (i > 0):
        count_pos += 1
    elif (i < 0):
        count_neg += 1
    total += i

is an infinite loop. i never changes, so if i!=0 is True the first time, then it'll always be True.

Next,

i = int( raw_input ("Enter an interger, the input ends if it is 0: "))
count = count_pos + count_neg

are completely unnecessary. Neither i not count is ever used in the following code.

The fixed code:

def main():
    count_pos = 0
    count_neg = 0
    while True:
        i = int( input ("Enter an interger, the input ends if it is 0: "))
        if i > 0:
            count_pos += 1
        elif i < 0:
            count_neg += 1
        else:
            break

    print ("The number of positives is", count_pos)
    print ("The number of negatives is", count_neg)
    print ("The total is", count_pos+count_neg)

And how would you create a program that can see if the comment is possitive or negative? — wqiejwqdjoi wqdwqewqewq, Dec 20 '14 at 14:26

Positive and negative numbers

2 Answers2