verilog $display

Verilog `$display` is a system function used for displaying values during simulation. It is commonly used for debugging purposes to print out the values of variables or signals. The syntax for `$display` is similar to `printf` in C programming. Here's an example:

module MyModule;
  reg clk;
  reg [7:0] data;

  always #10 clk = ~clk;

  initial begin
    clk = 0;
    data = 8'b10101010;
    $display("Data: %b", data);  // Display the value of 'data' in binary format
    $display("Data: %d", data);  // Display the value of 'data' in decimal format
    $display("Data: %h", data);  // Display the value of 'data' in hexadecimal format
    $finish;  // End the simulation
  end
endmodule

When this code is simulated, it will print the value of 'data' in binary, decimal, and hexadecimal formats. The output will depend on the simulator being used.