How do you plan to solve it?
module jk_ff ( input CLK, input J, input K, output reg Q ); // Write your code here always @(posedge CLK) begin case({J,K}) 2'b00 : Q<=Q; 2'b01 : Q<=0; 2'b10 :Q<=1; 2'b11 :Q<=~Q; default :Q<=1'b0; endcase end endmodule