Figure P4.3 shows a modified version of the code for a 2-to-4 decoder in Figure 4.37. This code is almost correct but contains one error. What is the error?

Figure P4.3 Code for Problem 4.22.

Figure 4.37 A 2-to-4 binary decoder specified using the for loop.

  

module dec2to4 (W, En, Y); input [1:0] W; input En; output reg [0:3] Y; integer k; always @(W, En) for (k = 0; k