Hello I am a bit confused on what to do after i have installed the JKD onto my laptop. I have already installed all the software that was required but when i go to run my code in the command prompt all it says is javac is not recognized as an internal or external command, operable program or batch file. if there is something that is missing I could use some help thank you.

look up instructions for adding the path to javac to your system path

in the meantime, if you find the path (in WIndows, it will probably start with c:\program files\java) you can type it out before the javac and java commands (eg c:\"program files"\java\jdk [stuff omitted here] \bin\javac MyClass.java).  Windows Explorer, Mac Finder, etc. are helpful in figuring out the location of javac and java.  I think find / -name javac would also work on a Mac.