My first attempt at Machine Learning

So I've started doing learning machine learning with tensorflow. Coming from a PHP background, I often forget that python doesn't require semi-colon. I haven't done anything impressive yet. Just some codes to make sure that my tensorflow works.

So here's the code that I've tried so far.

import tensorflow as tf
matrix1 = tf.constant([ [3., 3.] ])
matrix2 = tf.constant([ [2.], [2.] ])
product = tf.matmul(matrix1, matrix2)

sess = tf.Session()
result = sess.run(product)
print(result)

sess.close()

And my output is [ [ 12.] ]

Honestly, I don't know what's matmul, mathematically and programmatically. But I'll figure it out along the way. I just need more practise. At least I know I can get tensorflow to work.