tensorflow-算术运算和函数间的关系

import tensorflow as tf
a = tf.Variable(3.0)
b = tf.constant(4.2)

c = tf.add(a,b)
#张量间的普通加法也会转换成tf.add这种节点
d = a+b

e = tf.mul(a,b)
#张量间的普通乘法也会转换成tf.mul这种节点
f = a*b
init = tf.global_variables_initializer()
with tf.Session() as sess:
    sess.run(init)
    print(c)
    print(sess.run(c))
    print(d)
    print(sess.run(d))
    print(e)
    print(sess.run(e))
    print(f)
    print(sess.run(f))