Is Learning Rate Useful in Artificial Neural Networks?

This article will help you understand why we need the learning rate and whether it is useful or not for training an artificial neural network. Using a very simple Python code for a single layer perceptron, the learning rate value will get changed to catch its idea. An obstacle for newbies in artificial neural networks is the learning rate. I was asked many times about the effect of the learning rate in the training of the artificial neural networks (ANNs). Why we use learning rate?