you use function ptr when you want to call multiple functions using the ptr in a loop.
like have an array of funtion ptrs, loop through the array and execute the functions.

Break terminates a loop or switch. Continue jumps to the next iteration of an enclosing iteration statement. Goto jumps to a labelled statement.

The repeated execution of a loop of code while waiting for an event to occur is called busy-waiting. The CPU is not engaged in any real productive activity during this period, and the process does not progress toward completion.

It's the nature of the processes that they refer only to the small subset of the total data space of the process. i.e. the process frequently calls the same subroutines or executes the loop instructions.

while {condition} do {statement} done

for {variable name} in {list} do {statement} done

channel service unit. Digital interface device that connects enduser equipment to the local digital telephone loop. Often referred to together with DSU, as CSU/DSU.

When a window is visible on the screen it undergoes various stages such as CreateWindow, ShowWindow, etc. Once the window is displayed on the screen it must now make itself ready to take keyboard and mouse input from the user. Windows maintains a message queue for each windows program currently running under windows. When an input occurs, the OS translates this event into a message that it places into the windows message queue. A program receives messages from the message queue by executing a block of code known as the message loop.  While (GetMessage(&msg, NULL, 0, 0)){            TranslateMessage(&msg);            DispatchMessage(&msg);}  The GetMessage call passes to windows a pointer to the message and these fields of the message are filled by windows.  The TranslateMessage call passes the msg structure back to windows for some keyboard translation. The DispatchMessage call passes the message to windows which sends the message to appropriate windows procedure for processing the message. So this means that windows call the window procedure

One of the main causes of congestion is that traffic is often busy. If hosts could be made to transmit at a uniform rate, congestion would be less common. Another open loop method to help manage congestion is forcing the packet to be transmitted at a more predictable rate

The RETURN statement terminates the operation and exits out of a stored procedure or batch operation. RETURN also allows you to return a value to the  calling batch or stored procedure. The BREAK statement exits out of a while loop.