Javac not recognized in cmd prompt

Hello, I just began learning Java programming today. I am going through a course online very basic instructions of writing the source in notepad and saved as Hello.java under all files. JDK is downloaded on my Windows 10. Whenever I try to compile I get this message:

C:\Users\olivi\JavaSource>javac Hello.java
'javac' is not recognized as an internal or external command,
operable program or batch file.

I hear this is common problem and can be fixed through a PATH variable. Can anyone describe that to me and the steps so the complier is recognized? Thanks in advance! :)

I tried telling cmd prompt where javac was and it didn't work either. :confused:
C:\Users\olivi\JavaSource>C:\\"Program Files\"\Java\jdk1.8.0_05\bin\javac Hello.java
The system cannot find the path specified.

First make sure you have installed jdk and jre, both are installed with the java software development kit. The installation folder is typically C:\Program Files\Java.

Now go to Computer > Properties > Advanced system settings in the advanced tab click on Environment Variables

In System variables find the variable named Path, in the value of Path you will find a java path like C:\ProgramData\Oracle\Java\javapath, just change it to C:\Program Files\Java\jdk1.x.x_x\bin.

Thank you!