if we write the same run command again in the next line, will be the graph re-evaluated?

Source: Deep Learning on Medium

…e have to do is to call sess.run(res) and pass along an operation (here res) that want to evaluate. This will only run as much of the computational graph as needed to compute the value for res. This means that in order to compute res we have to compute prod and sum as well as a and b. Finall…