Flipping between two values using a for loop

I'm trying to figure out how to make this switch between -1 and 1. If I set p to -1, I still get it alternating between 0 and 1.

The actual question is as follows:

Have a for loop flip the value of p between -1 and 1, changing it once each loop iteration USING A SINGLE LINE OF CODE. Display the value of p each iteration by omission of semicolon. Use the pause() function to stop the loop temporarily each iteration.

 clc;
clear;
p = -1;
for k = 1 : 10
    p = ~p
    pause(1);
end

Any suggestions would be greatly appreciated!

Answer 1

[Star Strider]

Try this:

d = -1;
for k = 1 : 10
    p = d^k
    pause(1);
end

or you could simplify it further as:

for k = 1 : 10
    p = (-1)^k
    pause(1);
end

[Michael Doherty]

It worked! Thank you!

[Star Strider]

My pleasure!

If my Answer solved your problem, please Accept it.