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Detailed explanation of 'continue' examples of PHP jumping out of loops

怪我咯
怪我咯Original
2017-04-15 09:07:583055browse

After learning "break" to jump out of the loop, let's learn our "continue" to jump out of the loop.

continue is not as powerful as break to jump out of the loop. continue can only terminate this cycle and enter the next cycle.

The difference between break and continue is like ours It's like playing chess. Some people are not good at chess. When they see that they are about to lose, they turn off the chessboard and stop playing. This is a break. Some people know that if you lose this sentence, the next one will not win. If you admit defeat and try another game, this is continue.

continue control flow chart is as follows:

Detailed explanation of continue examples of PHP jumping out of loops

continue to jump out of the loop instance, The code is as follows

<?php   
  
for($i=0;$i<2;$i++)  
{  
    for($j=1;$j<4;$j++)  
    {  
        if($j==2)  
        {  
            continue 2;   //跳出最近的一个for循环的2次循环(j=2和j=3)  
        }  
    echo &#39;$i=&#39;.$i.&#39;$j=&#39;.$j."<br>";  
    }  
}  
 ?>

Code running results:

Detailed explanation of continue examples of PHP jumping out of loops

Detailed example explanation:

First execute the outermost loop of $i=0, and then execute $ j, when executing to $j==2 and encountering continue 2, it will jump out of the last 2 loops of the for loop, so j=2 cannot be printed,


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