javac not recognised as an internal or external command

[kkid]

I had this problem before but I managed to get it to work. I have since wiped my computer and re-installed the JDK and have this issue again.

java is recognised as a command (if I type it, the options appear).
javac comes up with the error in the title.

[Tolls]

Are you sure you installed a JDK and not a JRE?
If so then you'll need to manually edit the PATH environment variable. This should have been done by the installation, TBH.
You'll need to add the path to the JDK bin directory.

[kkid]

Are you sure you installed a JDK and not a JRE?
If so then you'll need to manually edit the PATH environment variable. This should have been done by the installation, TBH.
You'll need to add the path to the JDK bin directory.

Yes, I have installed the JDK. I know for sure as in the bin folder, I have javac.exe which I can use to compile files if I drag them onto it.

[Fubarable]

You have not addressed Tolls' comment about adding the bin directory to the system path. This is necessary for success.

[kkid]

I forgot to add it to PATH, i couldn't find which environment variable I was meant to use. I came across websites telling me to create "lib" variables and psoting the path in there and all other sorts of variable. Thanks for the help, it works now.