Please anyone help me with the error!

Please write the code-

Answer 1

[madhan ravi]

fprintf('The potential difference is \n')
disp(potential)

[Gaurav Srivastava]

Thankyou sir!

Answer 2

[KSSV]

potential = double(potential) ; 
fprintf('the potential difference is = %f\n',potential) ; 

Your variable potential is in syms...convert it to double. Read about double.

[madhan ravi]

I doubt that double() converts symunit variable

[Gaurav Srivastava]

Still not working sir!

[KSSV]

You should not attach code as image.......copy the code here.