unary operator ( –num etc )

	private static void postPreEntuware() {
		
		int x1 = -1;
		//System.out.println("initially x1 = "+x1);
		
		int x2 = x1--;
		
		//System.out.println("now (x1--) x1 = "+x1);
		
		int x3 = ++x2; 
		
		if(x2 > x3)
		{ 
			--x3; 
		}
		else
		{ 
			x1++; 
			--x3; 
		} 
		
		int answer = x1 + x2 + x3;
		System.out.println("answer = "+answer);
	}

 

Loops

remember the 3rd operand is like last line of the loop ( e.g.  for(int i=0; i<10; ++i )

so i++ , ++i make no difference in this case as the loop is effectively:

for(int i=0; i<10; ++i ){
  do something ...

  ++i; 

}

v. important – the loop increment is always the the last thing to happen, before the next turn of the loop

Assignment

 

Loop with break and continue

 

Below will not compile ( in ** Class ** even abstract, abstract method MUST be marked abstract )

abstract class Automobile{
   void honk();   
}