MATLAB: Won’t this program run

Question

close all;
clc;
clear all;
STEPS = 100;
tau = 10;
t0 = 2*tau;
dt = 1;
t = (0:STEPS-1)*dt;
gE = zeros(1:STEPS);
for i = 1:STEPS
    
    a = dt*STEPS;    
    gE(i) = exp(-((t-t0-a)/tau).^2);  
    
end

Answer 1

STEPS = 100;
tau = 10;
t0 = 2*tau;
dt = 1;
t = [0:STEPS-1]*dt;
gE = zeros(1,STEPS);
for i = 1:STEPS
    
    a = dt*STEPS;    
    gE(i) = exp(-((t(i)-t0-a)/tau).^2);  
    
end