Need Help TroubleShooting If/Else Statement

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Basically I have an if/else statement to ensure a given value obtain from cosine and sine is between -180 and +180.
In other words, if the value ends up being 270-deg, I want it to be -90-deg instead.
I set up an if/else statement as follows, where phi2a comes from a value from a function.
phi2b = 180-phi2a;
if phi2b > 180
phi2b = phi2b-360;
When I do this, however, whenever phi2b is greater than 180, it still produces a value greater than 180.
I tried to do a sample code (below) to see if the syntax is correct, but this one ended up working when I change the value of A:
A = 1;
if A > 10
A = A+5;
So if A=1, then it outputs 1. If A = 20, it outputs 25. This is how I want the other if/else to function.
I can show more of my code if need be.
Basically the phi2a is a vector running from 1 to N, where N is 4393. I then plot either phi1a, phi1b, phi2a, or phi2b (Not all of which is shown here), based on another if/else statement. I can show this code as well if it'll help.
If this is confusing please let me know so I can add more information.
Any help is appreciated. Thanks.
Edit: I've added a snippet of my whole code in case that helps.

Accepted Answer

the cyclist
the cyclist on 11 Mar 2021
Is it possible that your input value was greater than 540? Because if it was then it will still be greater than 180 after your if statement:
phi2b = 550;
if phi2b > 180
phi2b = phi2b-360
phi2b = 190
You could take care of this case by using a while loop instead:
phi2b = 550;
while phi2b > 180
phi2b = phi2b-360;
Jon Stapchuck
Jon Stapchuck on 11 Mar 2021
Okay thank you for your help. That makes sense why my original method didn't work

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