title: What is the difference between Loss, accuracy, validation loss, Validation accuracy?
body: <p>At the end of each epoch, I am getting for example the following output:</p>
  
  <pre><code>Epoch 1/25
  2018-08-06 14:54:12.555511: 
  2/2 [==============================] - 86s 43s/step - loss: 6.0767 - acc: 0.0469 - val_loss: 4.1037 - val_acc: 0.2000
  Epoch 2/25
  2/2 [==============================] - 26s 13s/step - loss: 3.6901 - acc: 0.0938 - val_loss: 2.5610 - val_acc: 0.0000e+00
  Epoch 3/25
  2/2 [==============================] - 66s 33s/step - loss: 3.1491 - acc: 0.1406 - val_loss: 2.4793 - val_acc: 0.0500
  Epoch 4/25
  2/2 [==============================] - 44s 22s/step - loss: 3.0686 - acc: 0.0694 - val_loss: 2.3159 - val_acc: 0.0500
  Epoch 5/25
  2/2 [==============================] - 62s 31s/step - loss: 2.5884 - acc: 0.1094 - val_loss: 2.4601 - val_acc: 0.1500
  Epoch 6/25
  2/2 [==============================] - 41s 20s/step - loss: 2.7708 - acc: 0.1493 - val_loss: 2.2542 - val_acc: 0.4000
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  </code></pre>
  
  <p>Can anyone explain me what's the difference between loss, accuracy, validation loss and validation accuracy?</p>