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