If we want to execute a command for multiple times, we can create a loop in MATLAB to do the job.

$($a$)$ Click the "New" $($or "New Script"$)$ button on the top left of the screen, then enter the following commands. This is an example of a for loop.

$n=20$

$x=$zeros$(1,n)$

sum $=0$

for $i=1$:$n$

$,x(i)=i^{{?}^{{?}^{?}}}2$

sum $={\displaystyle \underset{?}{\overset{?}{}}}+x(i)$

end

sum

$2$