Selected flow control statements--break statement and continue statement (with detailed explanation)

The previous article introduced you to "Detailed explanation and examples - for loop (and the difference between while loop)". This article continues to introduce to you the selected flow control statements--break statement and continue statement. (With detailed explanation), don’t hesitate to come in and learn! You will definitely gain something! ! !

1: break statement

Function:

• You can use break in switch to terminate the execution of the branch structure;

• You can use break in any loop structure to terminate the loop operation;

We will explain the specific structure by code operation. The code is as follows:

<?php 
/******break 语句******/
//break测试 输出10个hr
for($hr =0;$hr <10; $hr ++){
    echo $hr. &#39;<hr/>&#39;;
    if($hr == 4){
    break;
    }
}
?>

The code running result is as follows:

Note:

The break statement can be followed by parameters. The meaning of break1 is the same as break. If the break2 statement is set in the reloop to terminate the two-layer loop (nested loop)

For the specific structure, we use the code Operation explanation, the code is as follows:

<?php 
/******break 语句******/
//break测试 输出10个hr
for($hr =0;$hr <10; $hr ++){
    echo $hr. &#39;<hr/>&#39;;
    if($hr == 4){
    break;
    }
}
for($i =0;$i <10; $i ++){
    for ($j=0;$j<10;$j++){
        echo$j. &#39;&#39;;
    if($j== 4){
    break 2;
    }
    }
    echo &#39;<br/>&#39;;
}
?>

The code running result is as follows:

After understanding the break statement, we then understand the continue statement:

Continue function: Recycle the loop structure to terminate this cycle and start the next cycle;

We will explain the specific structure with code operations. The code is as follows:

<?php 
//continue
for($i=0;$i<10;$i ++){
    if($i == 4){
        continue;
    }
    echo $i;//0 1 2 3 5
}
?>

The code running result is as follows:

continue statement

Note:continue can be followed by numerical parameters. continue1 means the same as continue. If continue2 is set in a reloop, it means jumping to the outer layer to continue the loop (nested loop)

We will explain the specific structure with code operations. The code is as follows :

<?php 
//continue
for($i=0;$i<10;$i ++){
    if($i == 4){
        continue;
    }
    echo $i;//0 1 2 3 5
}
for($i =0;$i <10; $i ++){
    for ($j=0;$j<10;$j++){  
    if($j== 4){
    continue 2;
    }
    echo$j. &#39;&#39;;
    }
    echo &#39;<br/>&#39;;
}
?>

The code running results are as follows:

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