# what does eta constant mean in numpy

I am using numpy to implement some neural network tutorials. There is a constant("eta") used in codes. What does it means and what it stands for?

• eta is a greek letter $\eta$, it often is used for the learning rate. This is the distance with which you will reach to get to the next "more optimal" point when taking the gradient. – JahKnows Aug 1 '17 at 15:08