Java Basics - Functions 1

Function

 Function allow us to group together block of code and allow us to do a bunch of tasks and reuse it
Calling a function is equivalent to executing the code in the definition.

Example of the println function.

public void println(String x){
    //check that the String exists
   if (x== null){
           x= "null";
   }
   try {
   ensureOpen();
   //write String to screen
    textOut.write(x);
   }catch(IOException e) {
         trouble = true;
   }
   newline();
   }

Function call of the above example --> System.out.println("Print this:);

Functions allow the following:
-Easy to reuse code
-Organize and group code
-More maintainable code.
_____________________________________________________________

The word public is an access modifier and anyone can use public functions.
The word void is a return type that does not return data and only performs actions eg printing text.
In the case above the println is the function name.

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