For 4'b1011 I need to add an input carry and generate a sum and a carry. I keep getting an error message saying that a value cannot be assigned to input carry_in whenever I try to compile the code, so I am not sure on what I am doing wrong with the code below.

In Verilog

4'b1011: begin out = inp1 + inp2; //adds an input carry, generates a sum & carry if (inp1 +inp2 > 1111) carry_in = 1; //figure out why carry_in =1 is blocking code from running else carry_out <= carry_in; end