# Multiple sum in switch case calculator

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Serguzest on 17 Mar 2021
Commented: Serguzest on 18 Mar 2021
Im trying to write a calculator but i cant take multiple numbers from input operator to sum. How can i ?
John D'Errico on 17 Mar 2021
You learn to use vectors? You learn to use loops? Really, you need to learn MATLAB.

Dave B on 17 Mar 2021
I think that what you're asking about is using the input function to gather multiple values, and then passing those values into the sum function. If I'm incorrect, maybe you could give a little more detail in your question
You can accept a vector from 'input' using square brackets:
>> x=input('Enter some numbers, use brackets to specify a vector: ');
Enter some numbers, use brackets to specify a vector: [1 1 2 3 5 8]
>> sum(x)
ans =
20
An alternative design might be to use a loop, keep prompting for more numbers:
Script
x = 0;
next = 0;
prompt = "Enter a number, or hit enter without any value to compute sum: ";
while(~isempty(next))
next = input(prompt);
x=[x next];
end
sum(x)
Run
Enter a number, or hit enter without any value to compute sum: 1
Enter a number, or hit enter without any value to compute sum: 1
Enter a number, or hit enter without any value to compute sum: 2
Enter a number, or hit enter without any value to compute sum: 3
Enter a number, or hit enter without any value to compute sum: 5
Enter a number, or hit enter without any value to compute sum: 8
Enter a number, or hit enter without any value to compute sum:
ans =
20
Serguzest on 18 Mar 2021
very thanks, that promp code is exactly what i was looking for, greetings