Question

我对这个很新,我觉得我的"如果"结构有些问题, 但我不明白什么是真正的问题。

我正试图做以下工作:

<?php

$num = 1; 

while($num <=10)
{
    if ($num < 4)
    {
    print $num . " is less than 4 /";
    } 
    elseif ($num = 4)
    {
    print $num . " is just 4 /";
    } 
    elseif (($num > 4) && ($num < 10))
    {
    print $num . " is more than 4 and less than 10 /";
    } 
    elseif ($num = 10)
    {
    print $num . " is just 10 /";
    } 

 $num++; 

}

? & gt;

I have a couple hours around this so I finally decided to ask. Any help will be appreciated! Ty in advance for reading.

Answer 1

您正在使用任务操作员 =, 使用条件操作员

<?php

$num = 1; 

    while($num <=10)
    {
        if ($num < 4)
        {
        print $num . " is less than 4 /";
        } 
        elseif ($num == 4)
        {
        print $num . " is just 4 /";
        } 
        elseif (($num > 4) && ($num < 10))
        {
        print $num . " is more than 4 and less than 10 /";
        } 
        elseif ($num == 10)
        {
        print $num . " is just 10 /";
        } 

     $num++; 

    }
?>

Answer 2

在你的其他语句中,你必须使用==============================================================================================================================================

ev: elseif (num = 4) 而不是 elif (num = 4)

You might also consider using a switch statement. Good luck!

Answer 3

如果您需要比较变量, 请在条件中比较变量。但是您正在使用任务运算符。

请尝试一下这个代码

4) && ($num

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