plot what is calculated inside REPEATED for loop as one curve in one figure ?

can I plot x(i) outside the while and for loops ? which means I want to display one figure and one curve show me x value corresponding the number of for loop steps, for example for loop repeated itself 4 times, here I want to show me one curve of x corresponding 80 step

thanks in advance

while 1
    for i=1:20        % Repeated itself 4 times which means there will be 80 value for "x"
        x(i)=calculation
        
    end
end

plot (xi)

[Dyuman Joshi]

If I am understanding correct

for j=1:4
    for i=1:20
        x(i,j)=calculation
    end
end

You will get a 20x4 array and then you can plot the rows.