break, continue, return of Past and Present

1. break this cycle terminates

     note:

     1) break statement has no effect on the condition of the if-else statements. 
     2) In the multilayer loop, a break only one jump outward.

2.continue skip a cycle and the following statement for the next cycle.

        note:

      1) continue at the statement only for, while, do-while loop and the like, often used in conjunction with the if condition used to speed the cycle.

3.return end of the process, returned to the calling of the method, if it is main () function, then the end of the run the entire program