Effacer les filtres
Effacer les filtres

Loop and input question

3 vues (au cours des 30 derniers jours)
John Colley
John Colley le 11 Oct 2015
I need to create a loop that ask for s user inputed number and then adds odds number starting at 1 until target number is reached.
  2 commentaires
Image Analyst
Image Analyst le 12 Oct 2015
OK. Good luck with that. Feel free to post your code and ask a question after reading this if you need help.
Image Analyst
Image Analyst le 12 Oct 2015
What's an "odds number"? Do you mean odds, as in chance or probability? Maybe use rand() or randn(). Or did you mean "an odd number" like 1,3,5,7, etc.? If so, which number? Or do you need to ask the user for one?

Connectez-vous pour commenter.

Réponses (2)

Stalin Samuel
Stalin Samuel le 12 Oct 2015
%If you are trying to find the sum of all odd no's between 1 and s (i.e s is your limit )
prompt = 'What is the value of s? ';
s = input(prompt)
O_Sum = 1
for i = 2:s
if mod(i,2)
O_Sum = O_Sum +i
end
end
  1 commentaire
Stephen23
Stephen23 le 12 Oct 2015
This is a very inefficient loop: only half of the iterations actually perform anything useful. Rather than wasting lots of iterations, MATLAB easily iterates only over the odd values only, which means that the if statement is also not required:
s = input('What is the value of s? ','s');
x = 0;
for k = 1:2:str2double(s)
x = x+k;
end
Of course the whole thing would in any case be much neater and faster by using MATLAB's code vectorization abilities, which reduces this task to one simple sum command:
sum(1:2:str2double(s))

Connectez-vous pour commenter.


Maneet Kaur Bagga
Maneet Kaur Bagga le 5 Juil 2022
As per my uderstanding you want to create a loop which asks for an input from the user and returns the sum of odd numbers between 1 and the input number. Please find the code below as a solution. Hope it helps!
x = 100
x = 100
% You can use x = input() to take input from the user
num_sum = sum(1:2:x)
num_sum = 2500

Catégories

En savoir plus sur Loops and Conditional Statements dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by