create for loop for simple predation having global variables in matlab

main.m
% Initialize population sizes and parameters
global prey predator predation_rate
prey = 100; % initial prey population
predator = 20; % initial predator population
predation_rate = 0.02; % predation rate

% Run simulation for 100 time steps
num_steps = 100;
for i = 1:num_steps
    % Calculate new population sizes
    delta_prey = -predation_rate*prey*predator;
    delta_predator = predation_rate*prey*predator;
    prey = prey + delta_prey;
    predator = predator + delta_predator;
    
    % Ensure population sizes remain non-negative
    prey = max(prey, 0);
    predator = max(predator, 0);
    
    % Print results for this time step
    fprintf('Step %d: Prey = %.2f, Predator = %.2f\n', i, prey, predator);
end
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