How can I convert while loop to for loop?

This is the loop

while i<=5
E_(i)= x(i).^2;
if i==1
disp(['The amount of energy at fundamental harmonic is: ' num2str(E_(i))]);
else
disp(['The amount of energy at harmonic ' num2str(i-1) ' is: ' num2str(E_(i))]);
end
i=i+1;
end

Answer 1

[Voss]

Assuming the while loop starts with i = 1:

for i = 1:5
    E_(i)= x(i).^2;
    if i==1
        disp(['The amount of energy at fundamental harmonic is: ' num2str(E_(i))]);
    else
        disp(['The amount of energy at harmonic ' num2str(i-1) ' is: ' num2str(E_(i))]);
    end
end