why this loop is not working? Actually p_j value is not changing why?

n = input('please enter number of strips :');

for i = 1:n

for j = i

p_i = 0

p_j = p_i + D/(2*n)

epsilon_ci = (epsilon_max/xu)*(xu-p_j)

sigma_ci = 0.45*fc*[2*(epsilon_ci/0.002)-(epsilon_ci/0.002)^2]

p_i == p_j;

end

end

[Dyuman Joshi]

"why this loop is not working?"

It is working.

"Actually p_j value is not changing why?"

Because you are over-writing p_j with every iteration.

It is difficult to make any suggestions as it is not clear what you are trying to do. Format your code properly, mention values of variables and specify what you want to do with this code.

[Walter Roberson]

    p_i == p_j;

That is not an assignment statement

Answer 1

[Pritesh Shah]

Instead of p_j write p(j)

Answer 2

[VBBV]

n = 10;% e.g. input number  
epsilon_ci = 0.001;
epsilon_max = 0.01;
xu = 2; 
fc = 100;
D = 1.1;
p_i = 0; %outside for loop
for i = 1:n
    p_j(i) = p_i + D/(2*n);
    epsilon_ci = (epsilon_max/xu)*(xu-p_j(i));
    sigma_ci = 0.45*fc*(2*(epsilon_ci/0.002)-(epsilon_ci/0.002)^2);
    p_i = p_j(i);  % assign new p_i
end
p_j

p_j = 1×10

0.0550 0.1100 0.1650 0.2200 0.2750 0.3300 0.3850 0.4400 0.4950 0.5500

[VBBV]

You require only one for loop, since the inner for loop will lead to only one iteration,