JS Supplemental trivia point (Continue,break,ruturn)

1.continue,break,ruturn

The eg:1-100 and

$ (function  () {    $ ("#hello"). Click (function  ()    {        var iNum = 0;          for (var i = 1; i < 101; i++)        {            + = i;         }        alert (iNum)     ;});

The result is: 5050

Change to break to see the results

$ (function  () {    $ ("#hello"). Click (function  ()    {        var iNum = 0;          for (var i = 1; i < 101; i++)        {            if (i = = 5)            {                break;            }             + = i;        }        alert (iNum);     });

The result is: 10

Conclusion One: Break: Jump out of the entire loop body

How much is continue look at the results?

1$(function ()2 {3$ ("#hello"). Click (function ()4     {5         varINum = 0;6          for(vari = 1; I < 101; i++)7         {8             if(i = = 5)9             {Ten                 Continue; One             } AINum + =i; -         } - alert (iNum); the     }); -});

The result is: 5045, (executed except 5)

Conclusion Two: Continue skips the current condition of the loop

There are two ways to use return:

First use: Change to return to see what the result is?

The result is: no result, return End method body, jump directly outside the method body, so cannot print

The second usage of return: A method that returns a value

1$(function ()2 {3$ ("#hello"). Click (function ()4     {5         varINum = 0;6          for(vari = 1; I < 101; i++)7         {8             if(i = = 5)9             {TenI=A (i); One             } AINum + =i; -         } - alert (iNum); the     }); -     //the second use of return is that a method returns a value -     functionA (i) -     { +i + = 5; -         returni; +     } A});

The result is: 5015

Process parsing:

Conclusion Three: Return two usages, the first end of the entire method body, and the second, a method that returns a value

JS Supplemental trivia point (Continue,break,ruturn)