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

Think of a computation graph. In such graph, we need an input node to pass our data to the graph, those nodes should be defined as Placeholder in tensorflow.

Do not think as a general program in Python. You can write a Python program and do all those stuff that guys explained in other answers just by Variables, but for computation graphs in tensorflow, to feed your data to the graph, you need to define those nods as Placeholders.