how do I plot this...

Questions
1

how do I plot this on wolfram

y(x)=4 for 0<x<pi/2
y(x)=-4 for -pi/2<x<0
y(x)=0 for -pi<x<-pi/2 and pi/2<x<pi

2

Plot[Piecewise[{{4,
0 < x < [Pi]/2}, {-4, -[Pi]/2 < x < 0}, {0, -[Pi] < x < -[Pi]/
2}, {0, [Pi]/2 x < [Pi]}}], {x, -5, 5}]

3

Wow, quite complex! thank you so much!.. Can I ask, if it says that is periodic over an interval of 2pi, does it mean that the graph will entirely be on positive-y side throughout the positive-x side and entirely be on the negative-y side throughout the negative-x side?

4

Looks like a good candidate for Piecewise:

Plot[Piecewise[{{-4, -Pi/2 < x <= 0}, {4, 0 < x < Pi/2}}, 0], {x, -Pi, Pi}]
5

You rock, thanks a lot!