title: java if else statement
body: <p>I am a new student who is trying to use java if else statements at the moment.</p>
  
  <p>I have attched my class and i need to say if this code get 0 errors for all 4 errors(error11, error12, error13 and error14), need to display the text "Answer".
  This code was working without the if else statements and there are 2 errors in those 2 lines.
  Please explain me how to do it?</p>
  
  <pre><code>public static void deltaR()
   {
   int x;  
   int x11, x12, x13, x14;
   int x21, x22, x23, x24; //inputs
  
   double w10, w11, w12;//weights for first neuron
   int d11, d12, d13, d14;//desired output for first neuron
   double net11, net12, net13, net14;//sum of weights times inputs
   int y11, y12, y13, y14;//outputs
   int error11, error12, error13, error14;//error
  
   //double w20, w21, w22;//weights for second neuron
   //int d21, d22, d23, d24;//desired output for second neuron
   //double net21, net22, net23, net24;//sum of weights times input
   //int y21, y22, y23, y24;//outputs
   //int error21, error22, error23, error24;//error
  
   if (error11 = 0, error12 = 0, error13 = 0, error14 = 0)
   {
    System.out.println("Answer");
   }
   else if (error11 != 0, error12 != 0, error13 != 0, error14 != 0)
   {
   double coe=0.5;//learning coefficient
   x=1;
  
   x11=0;
   x12=0;
   x13=1;
   x14=1;
  
   x21=0;
   x22=1;
   x23=0;
   x24=1;
  
   d11= 0;
   d12= 1;
   d13= 0;
   d14= 1;
  
   w10=0.5;
   w11=-1;
   w12=1.5;
  
   net11=(x*w10 + x11*w11 + x21*w12);
   net12=(x*w10 + x12*w11 + x22*w12);
   net13=(x*w10 + x13*w11 + x23*w12);
   net14=(x*w10 + x14*w11 + x24*w12);
  
   if (net11&gt;=0)
    y11=1;
   else
    y11=0;
  
   if (net12&gt;=0) 
    y12=1;
   else
    y12=0;
  
   if (net13&gt;=0)
    y13=1;
   else
    y13=0;
  
   if (net14&gt;=0) 
    y14=1;
   else
    y14=0;
  
   error11=(d11-y11);
   error12=(d12-y12);
   error13=(d13-y13);
   error14=(d14-y14);
  
   System.out.println("net value 1:  "+net11);
   System.out.println("net value 2:  "+net12);
   System.out.println("net value 3:  "+net13);
   System.out.println("net value 4:  "+net14);
  
   System.out.println("output 1:  "+y11);
   System.out.println("output 2:  "+y12);
   System.out.println("output 3:  "+y13);
   System.out.println("output 4:  "+y14);
  
   System.out.println("error1:  "+error11);
   System.out.println("error2:  "+error12);
   System.out.println("error3:  "+error13);
   System.out.println("error4:  "+error14);
   }
   }
  }
  </code></pre>