## Help with calculating sums

on 14 Nov 2013

on 19 Nov 2013

### Image Analyst (view profile)

Write a program that receives an integer (n) and then calculate the sum of integers 1 to n (exp. 1 + 2 + 3 + ….. + n) using for loop

so confused :(

Roger Stafford

### Roger Stafford (view profile)

on 14 Nov 2013

As a last desperate measure you could simply write:

` the_sum = n*(n+1)/2;`

as Gauss is said to have correctly done in his primary school years.

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### Image Analyst (view profile)

on 14 Nov 2013

Use inputdlg() to get n - look in the help for examples. Then use a for loop. Here's a hint to get you started.

```theSum = 0;
for k = 1 : n
theSum = theSum + ........
end
```

I don't know what you mean by exp. Do you want e to the power? Like exp(1) + exp(2) + exp(3) + .... OR do you want exp(1+2+3+.....????

### O (view profile)

on 19 Nov 2013

It means (example) ... i thought it meant exponential too. Thanks a million!

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