two variables in while-loop

I'm supposed to sum up the numbers

and figure out how many joints are needed for the sum to be bigger than 0.9977? I've figured out this much:

But the task says that it must be solved with the while-loop. And I do not get this when I have two variables, k and n. How do I put it into this:

? Please help me understand, I have really tried, but I'm new to both the subject and matlab.

[madhan ravi]

Upload your code than a picture .

Answer 1

[Walter Roberson]

k = 0;
while sum < value
 k = k + 1;
 sum = ...
end

We recommend against naming a variable sum, due to the conflict with the very-often used sum() function. You should get into the habit of deliberately not naming variables sum: if you do not, then you are quite likely to end up with code that tries to use sum as a variable but also tries to use sum as a function.