Question

[Python] I need some help with my coding. For some reason, it isn't including the last number in my list.

Answer 1

Here is a picture of the code. Please ignore the top variables. It is for later use.

Answer 2

Here is the Code if you guys need it.

def main():
#Constant variables
greatest = 0
smallest = 0
maxRain = 0
minRain = 0
counter = 1
sum = 0.0

rainList = []
#Input validation
#Promp user to enter the number of months
while True:
try:
months = int(input("How many months? "))
while months < 0 :
print("Invalid Input (No Negative Numbers)")
months = int(input("How many months? "))
except ValueError:
print("Invalid Input")
continue
else:
break

while True:
try:
rainfall = int(input("Enter the rainfall (1): "))
if (rainfall < 0):
print("Invalid Input (No Negative Numbers)")
rainfall = int(input("Enter the rainfall (1): "))
except ValueError:
print("Invalid Input")
continue
else:
break

for i in range (2, months + 1):
rainList.append(rainfall)
rainfall = input("Enter the rainfall (" + str(i) + "): ")
print("The List is", rainList)



#Prompt user to enter the amount of rainfall
#Calculate the total
#Calculate the average
#Calculate the maximum and the minimum
#Display the total
#Display the average
#Display the maximum and the minimum with the months
'''for i in range (2, months + 1):
rainfall = int(input("Enter the rainfall (" + str(i) + "): "))
sum += rainfall
if(months == 1):
greatest = rainfall
if(smallest == 0):
smallest = rainfall
if(rainfall > greatest):
greatest = rainfall
maxRain = i
if (rainfall < smallest):
smallest = rainfall
minRain = i

average = sum/months

print("The total rainfall is %.2f" %sum)
print("The average monthly rainfall is %.2f" %average)
print("The Greatest Rainfall was in month %d and had a rainfall amount of %.2f" %(maxRain, greatest))
print("The Smallest Rainfall was in month %d and had a rainfall amount of %.2f" %(minRain, smallest))
'''
main()

Answer 3

@518nad

Answer 4

It looks like it's because you're not using rainList.append(rainfall) after the last input, so the last number isn't getting added to the list.

Answer 5

I tried putting it after the last input. But then it didnt count the first one.

Answer 6

put it in there after
```
rainfall = int(input("Enter the rainfall (1): "))
```

Answer 7

but keep it in the other place as well

Answer 8

Then my input validation doesn't work properly, and it takes in negative numbers, even after displaying that negative numbers arent allowed.

Answer 9

im here hi hihiihihi

Answer 10

Hi :)

Answer 11

what i need is the question

Answer 12

dont gimme that face

Answer 13

Lol. I basically have to take the users input. Put it into a list. Then display the sum, average, max, and min... using that list. But right now, I am just focusing on the list. For some reason it isn't accepting my last input.

Answer 14

oh cuz u appending before last input bruh

Answer 15

If I move it after the last input, it doesnt count the first input

Answer 16

aiight then put in an else and then do rainlist.append(rainfall)

Answer 17

ya silly

Answer 18

http://prntscr.com/d1jz72

Answer 19

within my input validation?

Answer 20

do that copy it twice

Answer 21

noo stopp wyd

Answer 22

Im doing what you saaaaaaid

Answer 23

take it outta else statement

Answer 24

nono just by itself above for loop on its own

Answer 25

O.

Answer 26

rainList.append(rainfall)
for i in range (2, months + 1):
rainfall = input("Enter the rainfall (" + str(i) + "): ")
rainList.append(rainfall)
print("The List is", rainList)

Answer 27

Yayy. It worked.

Answer 28

like this

Answer 29

yay

Answer 30

Are there ways I can find the max and min of the list other than using the "max" and "min" functions?

Answer 31

yeah u can code it urself

Answer 32

I mean have it in my code if you look at it. But how would i use that with my list?

Answer 33

I have it*

Answer 34

wdym use it with ur list, max and min is dont on a list

Answer 35

done*

Answer 36

k so lets say u working rainlist

Answer 37

rainList.append(rainfall)

for i in range (2, months + 1):
rainfall = input("Enter the Rainfall (" + str(i) + "): ")
rainList.append(rainfall)
sum = sum + rainfall
if(months == 1):
greatest = rainfall
if(smallest == 0):
smallest = rainfall
if(rainfall > greatest):
greatest = rainfall
maxRain = i
if (rainfall < smallest):
smallest = rainfall
minRain = i

average = sum/months
print("The List of Rainfall is", rainList)
print("The total rainfall is %.2f" %sum)
print("The average monthly rainfall is %.2f" %average)
print("The Greatest Rainfall was in month %d and had a rainfall amount of %.2f" %(maxRain, greatest))
print("The Smallest Rainfall was in month %d and had a rainfall amount of %.2f" %(minRain, smallest))

Answer 38

Would that work?

Answer 39

much work

Answer 40

why dont u check max and min after all ur input

Answer 41

check?

Answer 42

yeah so what u have right now u will have a list of rainfall right

Answer 43

rainlist=[......]
max=rainlist[0]
min=rainlist[0]
for i in range(1,len(rainlist)):
if rainlist[i] > max
max=rainlist[1]
if min !=0 and rainlist[i] < min
min=rainlist[i]
print max,min

Answer 44

What does lens() do?

Answer 45

oh wait is that length?

Answer 46

yeah maybe length

Answer 47

no its len

Answer 48

you kind of want to avoid using variables from before, incase u make changes to your array

Answer 49

so its good to just recalculate the array length before u do the max and min

Answer 50

notice the 2nd if, since 0 is the lowest value

Answer 51

this is not real max and min

Answer 52

its just trying to be a little efficient

Answer 53

if u start to learn python a bit more u can make max and min a bit more efficient if u knew the min value

Answer 54

like u can run max and min on different proccesses at the same time, and you can make min terminate as soon as it sees a 0, so then ur avoiding a whole process

Answer 55

im not quite sure how the if statement terminates locally in python, if they make it auto break once the condition on min !=0 is met

Answer 56

kinda silly though u dont really do python for efficieny, its more just learning algorithms and stuff

Answer 57

Hm I see....
Pretty confusing tho. lol

Answer 58

not that python is bad for programming or anythign

Answer 59

I think the other way might have been easier/better. I actually understood it that way. lol

Answer 60

But it isn't displaying my minimum properly. :/

Answer 61

Its actually not even checking the first input as a minum

Answer 62

And it is messing up with the number at where the minimum value is located. Like for example in the first picture, it says that 0 for the location, while in the second picture, it gave the correct location as 4.

Answer 63

u didnt run the 2nd part right

Answer 64

ur runing it in another for loop

Answer 65

so u have a choice here, either check ur list after its built or check while its built

Answer 66

http://prntscr.com/d1kld2

Answer 67

Yaaaaay. It worked. Not i need to take some time and understand how it worked.
If you could, please explain to me why the variables were set
greatest = rainfall
smallest = rainfall
minRain = 1
maxRain = 1
as so...

and what this even means...
if(rainfall > greatest):
greatest = rainfall
maxRain = i
if (rainfall < smallest):
smallest = rainfall
minRain = i

My professor showed this to us. But I have no idea what is happening here. I just know that it displays the min and max.

Answer 68

Now*

Answer 69

@518nad Can you explain it to me? :3

Answer 70

k wat do u wanna know

Answer 71

before we start checking the rest, u initialize max and min to first value and index to 1

Answer 72

then ur just checking each value in list, if its more than ur current thats the new max, if its less than ur current min thats the new min, u do that till the end, and ur update index incase theres a new min or max

Answer 73

hello

Answer 74

iowg