Please what is the meaning of "Declare variables, not war" please explain

Question

Programmers

Answer 1

This is a very great message.
Today the programs that we make are used to control complex machinery that is used in war.
There are cases of spies hacking the supercomputers and servers of other countries.
This certainly implies that we all have developed many programs to 'declare' war.
Therefore, 'Declare variables, not war'

Answer 2

thanks I gotten the Idea