Im trying to write a program that will determine the average of a number tests. The number of tests will vary, but I do not want it to be initially set by user input. I'm want to use a while loop and a sentinel value of zero to stop the input. I would like the average to display to three decimal places, with the % symbol immediately following the final digit as shown below...
SAMPLE RUN:
Enter test score 80
Enter test score 70
Enter test score 90
Enter test score 88
Enter test score 0
The average is 82.000%
total =0
counter = 0
while True:
entry = int(input('Enter test score:'))
if entry ==0:
break
total += entry
counter += 1
average = (total/counter)
print("The average score:",format(average, '.3f'),'%',sep='')
While needs to be all lowercase.
if entry == 0 is missing a colon.
total += entry and counter += 1 need to be inside the loop since they must happen with every iteration.
Did you try running the code you had before posting here?
total = 0
counter = 0
while True:
entry = int(input("Enter Test score: "))
if entry == 0: break
total += entry # this should be in while loop
counter += 1
total = total * 1.0
if counter == 0: exit(1)
avg = total / counter
print("Average is: %3.f" % avg + '%')
total += entry should be inside while loop, because you want to add it for every entry received.
hope that helped :)
It doesn't look like you even tried, because your code as is in not able to run at all. However, here is the answer. You'll want to store the results in a list, then get the average by the sum of the list over the length of the list (number of scores). the .format method allows you to specify 3 decimal places.
scores = []
while True:
entry = int(input('Enter test score: '))
if entry == 0:
break
scores.append(entry)
print('The average is', "{0:.3f}".format(float(sum(scores) / len(scores))))
The following should work.
scores = []
while True:
entry = input("Enter test score: ")
if entry == '':
break
elif not entry.isnumeric():
print("Scores must be numeric.")
else:
scores.append(int(entry))
average = sum(scores)/len(scores)
print("The average score is {:.03f}.".format(average))
The average is computed by taking the sum of the list of scores and dividing it by the total number of elements in scores. The rest is just logic to ensure that the user inputs numeric scores and exit when the user enters nothing (just presses Return with no text).
total =0
counter = 0
while True:
entry = int(input('Enter test score:'))
if entry ==0:
break
total += entry
counter += 1
average = (total/counter)
print("The average score:",format(average, '.3f'),'%',sep='')
Related
Write a program that always asks the user to enter a number. When the user enters the negative number -1, the program should stop requesting the user to enter a number. The program must then calculate the average of the numbers entered excluding the -1.
This is what I have come up with so far
num = int(input("How many number's are there?"))
total_sum = 0
avg = total_sum / num
for n in range (num):
number = float(input("Enter a number"))
while number <0:
print = ("Average is", avg)
number >0
print(number)
total_sum += number
avg = total_sum / num
print = ("Average is", avg)
I need it to stop at -1 one and still give an average of the numbers listed.
Easy.
emp = []
while True:
ques = int(input("Enter a number: "))
if ques != -1:
emp.append(ques)
continue # continue makes the code go back to beginning of the while loop
else:
if len(emp) != 0:
avg = sum(emp) / len(emp) # average is the sum of all elements in the list divided by the number of elements in said list
print(f"Average of all numbers entered is {avg}")
break
else:
print("Give me at least one number that's not -1")
continue # emp is empty we need at least one number to calculate the average so we go back to the beginning of the loop
I am new to python and trying to calculate a running total while validating the user input. If the user inputs invalid data I am showing an error and asking the user to input the correct data. My issue is I am unable to determine how to calculate only the valid data input from the user instead of all values.
# This program calculates the sum of a series
# of numbers entered by the user.
#Initialize an accumulator variable.
total = 0
#Request max value from user.
max_value = int(input("Enter a value for the maximum number: "))
#Request user to enter value between 1 and max value.
number = int(input("Enter a number between 1 and " + str(max_value) + " or negative number to end: "))
#Calculate total of user input values.
while number > 0:
total = total + number
number = int(input("Enter a number between 1 and " + str(max_value) + " or negative number to end:"))
#Display error if user entered invalid value.
if number == 0 or number > max_value:
print("Number entered is invalid!")
#Print sum of valid user input data.
else:
print("Sum of all valid numbers you entered:", total)
I can see that you have added too much unnecessary code and this is a very bad practice in python. I believe that this is the answer you are looking for:
f"" = is called a formatted string and
the while loop is unnecessary
so after that, you should import sys and use the exit function under a while loop and exit under a for loop
from sys import exit as exit1
while True:
max_value = int(input("Enter a value for the maximum number: "))
if max_value<0:
break
number = int(input(f"Enter a number between 1 and {max_value} or negative number to end: "))
total = max_value + number
if number == 0 or number > max_value:
print("Number entered is invalid!")
else:
print("Sum of all valid numbers you entered:", total)
So after reevaluating the code I wrote the first time I came up with the below and it functions as I would like. For a beginner that has only learned three chapters I think it is good. Current knowledge base is Input, Processing, Output, Decision Structures, Boolean Logic, and Repetition Structures.
# This program calculates the sum of a series
# of numbers entered by the user.
#Initialize an accumulator variable.
total = 0
# Request max value from user.
max_value = int(input("Enter a value for the maximum number: "))
#Request number between 1 and max value.
number = int(input("Enter a number between 1 and " + str(max_value) + " or negative
number to end: "))
#Validate the user input is between 1 and max value
# if so accumulate the number.
while number >= 0:
if number > 0 and number <= max_value:
total = total + number
elif number == 0 or number > max_value:
print("Number entered is invalid!")
number = int(input("Enter a number between 1 and " + str(max_value) + " or negative number to end: "))
#Once user select a negative number, print total.
else:
print("Sum of all valid numbers you entered:", total)
What this is supposed to do is:
To ask the user for numbers using while loop until they enter 0
when 0 is pressed we need to print the average of the numbers entered so far.
(Kindly help)
import statistics as st
provided_numbers = []
while True:
number = int(input('Write a number'))
if number == 0:
break
else:
provided_numbers.append(number)
print(f'Typed numbers: {provided_numbers}')
print(f'The average of the provided numbers is {st.mean(provided_numbers)}')
Take each number and print the average so far and stop it when input is zero, right?
s = 0
count = 0
while True:
num = int(input('Write a number: '))
if num == 0:
break
s += num
count += 1
print("Average so far:",(s/count))
Could you add a piece of code you have tried or sample input and output too?
My task is to:
"Write a program that will keep asking the user for some numbers.
If the user hits enter/return without typing anything, the program stops and prints the average of all the numbers that were given. The average should be given to 2 decimal places.
If at any point a 0 is entered, that should not be included in the calculation of the average"
I've been trying for a while, but I can't figure out how to make the programs act on anything I instruct when the user hits 'enter' or for it to ignore the 0.
This is my current code:
count = 0
sum = 0
number = 1
while number >= 0:
number = int(input())
if number == '\n':
print ('hey')
break
if number > 0:
sum = sum + number
count= count + 1
elif number == 0:
count= count + 1
number += 1
avg = str((sum/count))
print('Average is {:.2f}'.format(avg))
You're very close! Almost all of it is perfect!
Here is some more pythonic code, that works.
I've put comments explaining changes:
count = 0
sum = 0
# no longer need to say number = 1
while True: # no need to check for input number >= 0 here
number = input()
if number = '': # user just hit enter key, input left blank
print('hey')
break
if number != 0:
sum += int(number) # same as sum = sum + number
count += 1 # same as count = count + 1
# if number is 0, we don't do anything!
print(f'Average is {count/sum:.2f}') # same as '... {:.2f} ...'.format(count/sum)
Why your code didn't work:
When a user just presses enter instead of typing a number, the input() function doesn't return '\n', rather it returns ''.
I really hope this helps you learn!
Try this:
amount = 0 # Number of non-zero numbers input
nums = 0 # Sum of numbers input
while True:
number = input()
if not number: # Breaks out if nothing is entered
break
if int(number) != 0: # Only add to the variables if the number input is not 0
nums+=int(number)
amount += 1
print(round(nums/amount,2)) # Print out the average rounded to 2 digits
Input:
1
2
3
4
Output:
2.5
Or you can use numpy:
import numpy as np
n = []
while True:
number = input()
if not number: # Breaks out if nothing is entered
break
if int(number) != 0: # Only add to the variables if the number input is not 0
n.append(int(number))
print(round(np.average(n),2)) # Print out the average rounded to 2 digits
A list can store information of the values, number of values and the order of the values.
Try this:
numbers = []
while True:
num = input('Enter number:')
if num == '':
print('Average is', round(sum(numbers)/len(numbers), 2)) # print
numbers = [] # reset
if num != '0' and num != '': numbers.append(int(num)) # add to list
Benefit of this code, it does not break out and runs continuously.
This code needs to calculate an average to retrieve an integer between 0-100. Any suggestions would be great.
Prompt the user for the number of points they expect to receive
for engagement at the end of class. This number should not be
adjusted by the program (engagement is a total of 302).
Calculate the final based on an average of the quiz scores to
date.
Prompt the user for the various scores. -1 = no more scores, 0 -
zero for that assignment. Keep looping for the grade until the user
enters a -1.
Here is my code, I definitely do not understand lists very well. Probably clearly.
list1 = []
g=1
totalnum = 0
total=0
tot = int(input("Total Points? :"))
list1.append(tot)
eng = int(input("How many points do you expect to get in engangement, out of 302?: "))
list1.append(eng)
while g !=0:
num = int(input("Please enter a grade"))
if num == -1:
break
totalnum+=1
total= total+num
list1.append(num)
average= tot/eng+num
counter=0
while counter<totalnum:
print(list1[counter])
counter+=1
print("your average is",average)
If you can use built ins you can just use sum(your_list) / len(your_list) for the average.
If len(your_list) is zero, you will get a ZeroDivisionError, because you just broke math.
It's not clear to me that this is what you're trying to accomplish, but if you just want an average of all the values in the list, you can just do:
average = sum(list)/len(list)
This would return an integer, if you don't want it rounded you could do:
average = sum(list)/float(len(list))
As an aside, you have this:
counter=0
while counter<totalnum:
print(list1[counter])
counter+=1
Which could be made simpler, like:
for e in list1:
print e
Python will do the counting for you. :)
list1 = []
g=1
totalnum = 0
total=0
tot = int(input("Total Points? :"))
eng = int(input("How many points do you expect to get in engangement, out of 302?: "))
list1.append(eng)
while g !=0:
num = int(input("Please enter a grade"))
if num == -1:
break
else:
list1.append(num)
totalnum+=1
total= (num+eng)/tot
print(len(list1))
average = (sum(list1)/tot)*100
counter=0
for e in list1:
print (e)
print("your average is",average)
This is more what I was looking for. Thanks to #Tommy, #SQLnoob, and #Slayer for the tips that I have implemented into the code.