print + sign in ans

how to print ans like this: Result is: 1+2+3+4=10

Answer 1

[KSSV]

str = '1+2+3+4=10' ;
fprintf('Result is:%s\n',str)

[Mubashir Ali]

clc,clear
sum=0;
m=input('from:');
n=input('to:');
vec=zeros(m:n);
if m>n
    disp('Invalid numbers')
end
fprintf('result is:\n');
for i=m:n
    sum=sum+i;
    fprintf('\%')
end

[Mubashir Ali]

dear i want to print summation of integers with in loop..

[KSSV]

for i=m:n
    sum=sum+i;
    fprintf('result is:%f\n',sum)
end

[Walter Roberson]

fprintf('%d+', m:n-1);
fprintf('%d = %d\n', n, TheTotal)

You definitely need to fix your vec array, whatever it is for. You are currently constructing a multidimensional array, such as zeros(2,3,4,5) for the case 2:5

Using 'sum' as the name of a variable is not recommended; it is quite common to try to use 'sum' as a variable name and then in the same code segment, try to call sum() as a function.

[Jan]

@Mubashir Ali: We had multiple questions in the forum concerning the redefinition of "sum" as a variable:

% Hidden in another script:
sum = rand(1, 10);
...
sum(1:100)  % Why is this not working?

So better avoid using names of built-in function as variables. Use e.g. "s" instead.

Answer 2

[Jan]

This is a homework question, but you have shown an almost working code already. I only clean it up a little bit:

m = input('from:');
n = input('to:');
if m>n
  error('Invalid numbers');  % not DISP: Never proceed after an error!
end
% vec=zeros(m:n); % Neither needed, but better: vec = zeros(m-n, 1);

fprintf('result is:\n');
s = 0;
for i = m:n
  s = s + i;
  if i < n
    fprintf('%d + ', i);
  else  % In the last iteration display the result also:
    fprintf('%d = %d\n', i, s);
  end
end