How to compute total links in a Graph?

Hello all, I am trying to compute total links in a following graph but not getting it correctly.

Suppose there are 15 small mobile towers which can act as source as well as target and 1 Big mobile tower which will only act as target and are modelled as below:

My query is how to compute the total links in this Graph. Any help in this regard will be highly appreciated.

diff_smt = 15; % different number of small mobile towers
bmt = 1; %  only one big mobile tower which is target
idx_bmt = diff_smt +1; % index of big mobile tower (target)
sr = [1 1 1 2 2 2 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 10 10 10 11 11 12 12 13 13 13 14 14 15 15 15]; % various possible sources
ta=randi([2,16],1,length(sr)); % various possible targets
G = graph(sr,ta);
plot (G);

Answer 1

[Steven Lord]

There are many functions you can call on graph objects, including the numedges function.

[charu shree]

Thanks a lot sir for your to the point answer.