how possible to terminate a loop in case my condition is not met?

Below I pasted a part of my code. it is a sort of simulation program. Loading_B matrix created in the end is (nparticle x ngen) sized matrix. Each particle is assigned for one row in Loading_B matrix. In case an element for an assigned particle in a row is zero, I want to go back the beginning of the main loop and start generating random v_last values till I meet all requirements to fulfill all rows in Loading_B matrix. How can I do that?

tap = 2.5;       %tap step in per cent
tapmax = 5;
nparticle = 100;
nbus = 25;
ngen = 5;
vmin = 0.95;
vmax = 1.05;

%Initialize the positions of the particles
Xs=zeros(nparticle,2);
TapPositions=zeros(nparticle,2);    % Initial position of particles (tap position/control parameter)
Voltages=zeros(nparticle,ngen);     % Initial position of particles (voltage/control parameter)
Loading_A=zeros(nbus,nparticle);

% loading initial line and bus data
data25

% Busbars at where WFs are connected
n_WF1=4;  % 30 MVA
n_WF2=7;  % 60 MVA
n_WF3=8;  % 45 MVA
n_WF4=9;  % 21 MVA
n_WF5=11; % 60 MVA

% Nominal powers of WFs [MW] 
NominalWF = zeros(n,1);

NominalWF(n_WF1,1)=30;
NominalWF(n_WF2,1)=60;
NominalWF(n_WF3,1)=45;
NominalWF(n_WF4,1)=21;
NominalWF(n_WF5,1)=60;  

for particle=1:nparticle

        v_last1 = vmin + (vmax-vmin).* rand (particle,1);
        v_last2 = vmin + (vmax-vmin).* rand (particle,1);
        v_last3 = vmin + (vmax-vmin).* rand (particle,1);
        v_last4 = vmin + (vmax-vmin).* rand (particle,1);
        v_last5 = vmin + (vmax-vmin).* rand (particle,1);

        % Initial reference voltages of WFs
        voltage = [v_last1 v_last2 v_last3 v_last4 v_last5];

        % Put reference voltages of WFs into bus-data
        busdata(n_WF1,3)=voltage(particle,1); 
        busdata(n_WF2,3)=voltage(particle,2);
        busdata(n_WF3,3)=voltage(particle,3);
        busdata(n_WF4,3)=voltage(particle,4);
        busdata(n_WF5,3)=voltage(particle,5);

        % Initial tap positions of transformers
        tap_p1 = round(-tapmax+2*tapmax*rand(1));
        tap_p2 = round(-tapmax+2*tapmax*rand(1));

        tap_1 = tap_p1*tap/100;
        tap_2 = tap_p2*tap/100;

        TapPositions(particle,1)=tap_p1;
        TapPositions(particle,2)=tap_p2;

        % Change the tap position of the transformer (TR1 and TR2)
        linedata(1,6) = 1 + tap_1;
        linedata(2,6) = 1 + tap_2;

        %After initializing reference voltages of WFs and transformer tap
        %positions, execute Load (Power) Flow
        LFYBUS              % Bus Admittance Matrix
        LFNEWTON_edited     % Newton-Raphson Method    
        BUSOUT              % Power Flow Solution

        % Calculation of apparent power at CPs and of WFs
        Sg= sqrt(Qg.^2+Pg.^2);

        % Reactive power at CPs (QCP1 and QCP2)
        objective1=Qg(1,1);
        objective2=Qg(2,1);

        Xs(particle,1)=abs(objective1);
        Xs(particle,2)=abs(objective2);

        for i=1:n % n, the number of busbars
            if Sg(i,1)~=0 && NominalWF(i,1)~=0
               Loading_A(i,particle)=(Sg(i,1)./NominalWF(i,1))*100;      
            end   
               Loading_B = (Loading_A(sum(Loading_A') ~= 0, :))';
        end

% Reactive power at CPs within WF loading limits (LoadingWF<=150)
        for g=1:ngen
            if  Loading_B(particle,g)>110;
               ...
         ...
               ...
            end   
        end
    end
 end

Answer 1

[the cyclist]

Sounds like you want the continue command.

Alternatively, you could rewrite your main loop as a while loop rather than a for loop.

Answer 2

[Rengin]

I think I should use "while true" and "break" comments in somewhere. The problem is that I can only check the elements in a row one by one. If an element in the row doesn't meet the condition which I put, I don't want to check the following element. I want to go back the beginning of main loop and generate random values again till I find suitable condition for the same row.