Infinite nested loop in matlab

I want to write a program that user enter the value of n that is the number of nested loops. n is dynamic and can change by user (if n=3 then we should have 3 loops inside loop as the same below)

for i=1:100

for j=1:100-i

for k=1:100-i-j

i+j+k

end

end

end

how should i program this??

[Stephen23]

See already existing discussions on this topic:

https://www.mathworks.com/matlabcentral/answers/345551-function-with-varying-number-of-for-loops#answer_271331

https://www.mathworks.com/matlabcentral/answers/79986-how-can-i-condition-the-number-of-nested-for-loops-in-a-function-on-an-input-argument

https://www.mathworks.com/matlabcentral/answers/381505-creating-a-variable-number-of-nested-for-loops

Answer 1

[NVSL]

Hey @elham eftekhari,

I understand you are trying to have your number of for loops to be varying based on your input. The best way to achieve this is by recursion. You can have a function that recurses “n” times based on your input. Below is a possible implementation:

%e - end point(100), s - starting sum(0)
function f(e, s, n)
if n == 1
    for i = 1:e
        s+i
    end
else
    for i=1:e
        f(e-i, s+i, n-1)
    end
end
end

f(100, 0, 3)

This code essentially gives the same output as the code you provided. Please set the values of n and e to lower numbers, as higher values tend to exponentially increase processing time.