I understand that the code you are executing is unable to run the “else” part.
The issue with the code is in the syntax of the “if-else” statement. In MATLAB, the “else” statement doesn't take a condition. It's a catch-all for when the “if” condition is false. To check another condition, you can use use “elseif”.
Here is an implementation of the same, in the given code snippet:
V = 4; %m^3, Volume
Vo = 0.04; %m^3/s
T = V/Vo; %s, Time constant
k = 0.01; %m^3/mol/s, Rate constant
CA0 = input('The value of the inlet concentration (CA0) is: ');
CA1 = ((1 + 2 * T * k * CA0)- sqrt(1 + 4 * T * k * CA0)) / (2 * T * k);
CA2 = ((1 + 2 * T * k * CA1)- sqrt(1 + 4 * T * k * CA1)) / (2 * T * k);
CA3 = ((1 + 2 * T * k * CA2)- sqrt(1 + 4 * T * k * CA2)) / (2 * T * k);
CA4 = ((1 + 2 * T * k * CA3)- sqrt(1 + 4 * T * k * CA3)) / (2 * T * k);
CA5 = ((1 + 2 * T * k * CA4)- sqrt(1 + 4 * T * k * CA4)) / (2 * T * k);
p = ['The value of CA1 is: ',num2str(CA1)];
disp(p);
if (10 < CA1)
disp('The final desired concentration has not been reached, moving to 2nd CSTR');
p = ['The value of CA2 is: ',num2str(CA2)];
disp(p);
elseif (10 < CA2)
disp('The final desired concentration has not been reached, moving to 3rd CSTR');
p = ['The value of CA3 is: ',num2str(CA3)];
disp(p);
end
For additional information, refer the following MathWorks documentation on “if, elseif, else”:
