What's the difference between tf.placeholder and tf.Variable?

Question

I\'m a newbie to TensorFlow. I\'m confused about the difference between tf.placeholder and tf.Variable. In my view, tf.placeholder is

Answer 1

TL;DR

Variables

• For parameters to learn
• Values can be derived from training
• Initial values are required (often random)

Placeholders

• Allocated storage for data (such as for image pixel data during a feed)
• Initial values are not required (but can be set, see tf.placeholder_with_default)