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//----------------------------------------------------------------------------------
//                      www.verificationguide.com
//----------------------------------------------------------------------------------
module nonblocking_assignment;
  //variables declaration
  int a,b;
  
  initial begin  //initial block will get executed at starting of simulation
    $display("-----------------------------------------------------------------");
    //initializing a and b
    a = 10;
    b = 15;
    
    //displaying initial value of a and b
    $display("\tBefore Assignment :: Value of a is %0d",a);
    $display("\tBefore Assignment :: Value of b is %0d",b);
    
    a <= b;
    b <= 20;
    
    $display("\tAfter  Assignment :: Value of a is %0d",a);
    $display("\tAfter  Assignment :: Value of b is %0d",b);
    $display("-----------------------------------------------------------------");
  end
​
  final begin  //final block will get executed at end of simulation
    $display("-----------------------------------------------------------------");
    $display("\tEnd of Simulation :: Value of a is %0d",a);
    $display("\tEnd of Simulation :: Value of b is %0d",b);
    $display("-----------------------------------------------------------------");
  end    
endmodule
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