Java Basic Four

The difference between break continue return

Key words	Position	Role
Break	Switch and loop	End Loop
Continue	Cycle	End this cycle and proceed to the next cycle
Return	Used anywhere in the method	End method

Use break in A for loop

1         intscore;2         intSum=0;3         inti;4          for(i=1;i<=5;i++){5System.out.println ("Please enter your score");6Scanner scanner=NewScanner (system.in);7Score=scanner.nextint ();8             if(score<0){9SYSTEM.OUT.PRINTLN ("Input error, re-enter");Ten                  Break;//End for Loop One             } A  -sum+=score; -  the  -         } -         if(i==6){ -System.out.println ("Average score" + (SUM/5)); +}

Use break in switch

1      Switch(number) {2                  Case1:3System.out.println ("Square");4                      Break;//Jump out of switch5                  Case2:6System.out.println ("Triangle");7                      Break;8                  Case3:9System.out.println ("Round");Ten                      Break; One                 default: ASYSTEM.OUT.PRINTLN ("Input Error"); -                      Break; -}

Use continue in for

1 /**an even number of output 1~10*/2  Public classTest {3      Public Static voidMain (string[] args) {4          for(inti=1;i<=10;i++){5            if(i%2!=0){6                Continue;//If I is not an even number, do not execute the subsequent output statement and continue with the For loop7            }8 System.out.println (i);9         }Ten     } One}

Return

1  Public classTest {2      Public Static voidMain (string[] args) {3A://Define a here4          for(inti=1;i<=5;i++){5             for(intj=1;j<=5;j++){6               /**7 * if (i==3) {8 *//break; End Inner Loop9 *//Break A; End of outer loop printout final EndTen *//return; Ends the entire program, does not print out the final "end" statement One                *                } A                * -                * */ -  the  -                if(j==3){ -                   //continue;//end this inner loop -                    ContinueA//end this outer loop +  -                } +System.out.print (i+ "Row" +j+ "column"); A            } at System.out.println (); -         } -System.out.println ("End"); -     } -}

Java Basic Four