Update a variable for each step along x-axis within loop

Hi there

So I'm calculating an erosion rate along a profile. For the first step, x = 1, I use an initial concentration of 0.1. My system then erodes sediment at the first step. I want to add this sediment to the initial concentration and use this updated concentration for x = 2, and so on.

For example

maxX = 100
C = 0.1
x = 1

while x < maxX
    E = C * 50
    C = C + E
    
    x = x+1
end

So for x(1) :

E = 0.1*50

E = 5

Then for x(2), I want to carry out the code using the re-calculated C value, so C(2) = C(1) + Y(1) = 5.1

and then continue doing the code within the loop, recalculating C each time, all the way up to maxX.

Does anyone know how to write this?

Thank you!