How in bash to count the number of lines printed to the screen after executing a command?

Question

bash

for example, after executing the command ls -l
ps, the solution is needed in general, and not specifically for ls -l

Answer 1

https://linux.die.net/man/1/wc
If you need to display and calculate, then

res=$(ls -l)
echo "$res"
echo $(echo "$res"|wc -l)

Answer 2

ls -l | tee >(wc -l)