CODEWITHSUNDEEP
pythonfor-loop
MAK
MAK

Reputation: 3

I have to write a program that calculates and displays the total score using a for loop?

I'm quite new to the for loops in Python. So, I want to write a program that asks the user to enter to enter 20 different scores and then I want the program to calculate the total and display it on the screen. How could I use a for loop to do this? edit: I can ask the user to for the different numbers but I don't know how to then add them.

Upvotes: 0

Views: 1591

Answers (3)

iPhynx
iPhynx

Reputation: 431

total = 0

for _ in range(1,20):
    num = input('> ')
    total += int(num)

print(total)

I hope this helps.

Upvotes: 1

James McCorrie
James McCorrie

Reputation: 2652

Try something like this:

total = 0;   # create the variable
for i in range(1,20): # iterate over values 1 to 20 as a list
     total += int(input('Please enter number {0}: '.format(i)));

print("Sum of the numbers is '{0}'".format(total))

I'd suggest you go through the tutorials on the python site:

I could go into a lot of detail here and explain everything, however I'd only be duplicating the resources already available. Written far better than I could write them. It would be far more beneficial for you (and anyone else reading this who has a similar issue) to go through these tutorials and get familiar with the python documentation. These will give you a good foundation in the basics, and show you what the language is capable of.

Input

To read a value from the commandline you can use the input function, e.g. valueString = input("prompt text"). Notice the value stored is of type string, which is effectively an array of ASCI/Unicode characters.

So in order to perform math on the input, you first need to convert it to its numerical value - number = int(valueString) does this. So you can now add numbers together.

Adding numbers

Say you had two numbers, num1 and num2, you can just use the addition operator. For example num3 = num1 + num2. Now suppose you have a for loop and want to add a new number each time the loop executes, you can use the total += newNum operator.

Upvotes: 1

Luke Xu
Luke Xu

Reputation: 2440

Without giving you the full code here is the pseudocode for what your code should look like

x = ask user for input
loop up till x //Or you could hard code 20 instead of x
    add user input to a list
end
total = sum values in list
print total

Here are all the things you need to implement the logic

User input/output: http://anh.cs.luc.edu/python/hands-on/3.1/handsonHtml/io.html

Loops: https://wiki.python.org/moin/ForLoop

Summing a list: https://docs.python.org/2/library/functions.html

Upvotes: 1

Related Questions