Tensorflow Placeholder with Example

Tensorflow Placeholder with Example of Calculating Area of Triangle.
Run the code here: https://repl.it/@VinitKhandelwal/tensorflow-placeholder-area-triangle

import tensorflow as tf

def compute_area(sides):

  a = sides[:, 0]

  b = sides[:, 1]

  c = sides[:, 2]

  s = (a+b+c)*0.5

  areasq = s*(s-a)*(s-b)*(s-c)

  return tf.sqrt(areasq)

with tf.Session() as sess:

  sides = tf.placeholder(tf.float32, shape=(None, 3))

  area = compute_area(sides)

  result = sess.run(area, feed_dict={sides:[[5.0, 3.0, 7.1], [2.3, 4.1, 4.8]]})

  print(result)

OUTPUT
[6.278497 4.709139]

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