For example in the previous exercise, we used Modulo to see if z % 2 is zero, which means z is even. We can ask the program to do something only of z is even. Below so the pseudo code to do that (pseudo code is descriptive English words that explains what the code which is yet to be written is intended to do).
if ( (z % 2) ==0) print "z is even!"
This code reads first calculate z % 2, and if that is 0, print out a message saying z is even