MATLAB: If i have a for loop doing iterations based on random intervals of time between .5-5 seconds, how do i keep track of that time

Question

for i=1:60; x=(.5+4.5*rand)+x;

how do i figure out how much time went by during these 60 iterations?

Answer 1

x = cumsum(.5+4.5*rand(60,1));

or just

x = sum(.5+4.5*rand(60,1));