How to decide parameters w and b for custom Neural network?

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
1

I did not understand how can we choose what will be the best values of w and b in a neural network and why exactly are they used.

2

It’s possible that I’m just misinterpreting your question, but my response is that the point is we do not choose the w and b values: the network learns the best values by using the combination of Back Propagation and Gradient Descent.

3

Thank you I understood now why we choose random values for w and b initially.

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