In [1]:

    

import tensorflow as tf


    

In [2]:

    

a = tf.constant(10)
b = tf.constant(20)
c = a + b


    

In [3]:

    

c


    

    
Out[3]:





<tf.Tensor 'add:0' shape=() dtype=int32>

In [4]:

    

with tf.Session() as sess:
    result = sess.run(c)
    print(result)


    

    




30

In [5]:

    

a = tf.placeholder(tf.float32)
b = tf.placeholder(tf.float32)
c = a + b


    

In [6]:

    

c


    

    
Out[6]:





<tf.Tensor 'add_1:0' shape=<unknown> dtype=float32>

In [7]:

    

with tf.Session() as sess:
    result = sess.run(c, feed_dict={a: 10, b: 20})
    print(result)


    

    




30.0