如何计算For循环的结果

Question

我们如何计算For Loop的结果

$starting_year=2001;
$ending_year=2015;

for ($x = $starting_year; $x <= $ending_year;$x++) {
    echo "$x <br />";
} 

我该如何计算这一代？例如，上面应该是5

Answer 1

尝试使用 获取代数 循环，但我也有一个问题，例如为什么你需要 for 循环这里只是减去去年到第一年的价值来生成

$starting_year = 2001;
$ending_year = 2015;
$generation = 0;
for ($x = $starting_year; $x <= $ending_year; $x++) {
   echo "$x <br />";
   $generation++;
} 
echo "No of generation $generation";

Answer 2

希望它会对你有帮助，

<?php
  $starting_year = 2001;
  $ending_year = 2015;
  $count = 0;

  for ($x = $starting_year; $x <= $ending_year; $x++) {
    $count++;
  } 
  echo $count;
?>

Answer 3

你不需要循环。

试试这个：

<?php
    $starting_year=2001;
    $ending_year=2015;
    $generation = $ending_year - $starting_year;
    echo $generation;
?>