[英]How can i write this as a while loop? PHP
<?php
for ($i=0; $i<10; $i++) {
$number = mt_rand(1, 100);
if ($number %2== 0) {
$result = 'even';
} else {
$result = 'odd';
}
echo $number.' '.'('.$result.')'.'<br>';
}?>
I want to write it in a while loop form this is as far as i have gotten.我想以 while 循环形式编写它,这是我所得到的。 It just prints one random number and nothing else.它只打印一个随机数,仅此而已。 I am using phpStorm and edge browser on PHP8.1.我在 PHP8.1 上使用 phpStorm 和边缘浏览器。
<?php
$i=0;
while ($i<10) {
if ($number=mt_rand(1,100)) {
$result = 'even';
} else {
$result = 'odd';
}
$i++;
echo $number.' '.'('.$result.')'.'<br>';
}
?>
The main reason that the code is not working is that you are assigning the $number = mt_rand(1,100)
inside the if()
condition.代码不起作用的主要原因是您在if()
条件内分配了$number = mt_rand(1,100)
。
So everytime you execute if then it will not compare but it'll keep assigning the $number
variable.所以每次你执行 if then 它都不会比较,但它会继续分配$number
变量。 I have separated the assignment and comparison logic.我已经分离了分配和比较逻辑。
Try This:尝试这个:
<?php
$i=0;
while ($i<10) {
$number = mt_rand(1,100);
if ($number % 2 == 0) {
$result = 'even';
} else {
$result = 'odd';
}
$i++;
echo $number.' '.'('.$result.')'.'<br>';
}
i changed to 10 to make case: the script you use can generate numbers can repeat;我改为 10 以说明情况:您使用的脚本可以生成数字可以重复; the second script i put generates unique random numbers(in case you need);我放的第二个脚本会生成唯一的随机数(如果需要); by uncomment //$max=100;
通过取消注释//$max=100;
and commenting $max=10;
并评论$max=10;
the second script will generate UNIQUE NUMBERS in range 1..100第二个脚本将在 1..100 范围内生成 UNIQUE NUMBERS
<?php
/*the first script*/
$max=100;
//$max=10;
$i=0;
while ($i<10) {
if (($number=mt_rand(1,$max))and(($number % 2) ==0)) {
$result = 'even';
} else {
$result = 'odd';
}
$i++;
echo $number.' '.'('.$result.')'.'<br>';
}
echo '<hr>';
/*the second script : unique numbers*/
$nrs=range(1,$max);
$i=-1;while($i++<9){
$pos=mt_rand(0,count($nrs)-1);
$nr=$nrs[$pos];
unset($nrs[$pos]);
rsort($nrs);
echo $nr.'-'.(($nr%2)==0?'even':'odd').'<br>';
}
?>
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