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 if(J && K) Q<=~Q; else if(!J && K) Q<=1'b0; else if(J && !K) Q<=1'b1; else if(!J && !K) Q<=Q; end endmodule