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PHP回合

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發布： 2024-08-29 13:10:16

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每當需要將給定的浮點數向上或向下舍入到最接近的整數時，我們都會使用 PHP 中稱為舍入函數的函數。它需要三個參數，即數量、精度和模式。其中 number 是已被上捨入或向下捨去到最接近的整數的浮點數。 Precision表示要捨入的小數位數，該參數是可選的，mode是指定舍入模式的常數，該參數也是可選的，其值可以是PHP_ROUND_HALF_UP、PHP_ROUND_HALF_DOWN、PHP_ROUND_HALF_EVEN或PHP_ROUND_HALF_ODD。

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在 PHP 中宣告舍入函數的語法：

round(number, precision, mode)

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哪裡，

數字是向上捨入或向下捨去到最接近的整數的浮點數。
精度表示要四捨五入到的小數位數，此參數是可選的。
Mode 是指定舍入模式的常數，該參數也是可選的，其值可以是 PHP_ROUND_HALF_UP、PHP_ROUND_HALF_DOWN、PHP_ROUND_HALF_EVEN 或 PHP_ROUND_HALF_ODD。

PHP 中 round 函數的工作原理

每當需要將給定的浮點數向上或向下舍入到最接近的整數時，我們都會使用 PHP 中稱為舍入函數的函數。
PHP 中的 round 函數需要三個參數，分別是數字、精確度和眾數。
參數編號是向上捨入或向下捨去到最接近的整數的浮點數。
參數精度表示要四捨五入到的小數位數，可選。
參數mode是一個常數，指定舍入模式，該參數也是可選的，其值可以是PHP_ROUND_HALF_UP、PHP_ROUND_HALF_DOWN、PHP_ROUND_HALF_EVEN或PHP_ROUND_HALF_ODD。

PHP回合範例

以下是 PHP 回合的範例：

範例#1

PHP 程序，用來說明捨入函數的工作原理，將給定的浮點整數四捨五入為最接近的整數，最多三位小數值。

代碼：

<html>
<body>
<?php
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called a
$a = round(6.7654,3);
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called b
$b = round(2.98765,3);
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called c
$c = round(5.87654,3);
#The result after using the round function is displayed as the output on the screen
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $a;
echo "<br>";
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $b;
echo "<br>";
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $c;
echo "<br>";
?>
</body>
</html>

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輸出：

PHP回合

在上面的程式中，round 函數用於將給定的浮點整數四捨五入到最接近的整數，最多三位小數，並儲存在名為 a、b 和 c 的變數中。然後，將給定浮點整數四捨五入到最接近的整數2（最高可達舍入函數中指定的小數值）後的結果將以輸出顯示在螢幕上。

範例#2

PHP 程序，用於說明捨入函數的工作原理，將給定的浮點整數四捨五入到最接近的整數，最多一位小數值。

代碼：

<html>
<body>
<?php
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called a
$a = round(8.37465,1);
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called b
$b = round(1.09456,1);
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called c
$c = round(3.87654,1);
#The result after using the round function is displayed as the output on the screen
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $a;
echo "<br>";
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $b;
echo "<br>";
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $c;
echo "<br>";
?>
</body>
</html>

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輸出：

PHP回合

範例#3

PHP 程序，用來說明捨入函數的工作原理，將給定的浮點整數四捨五入為最接近的整數，最多兩位小數。

代碼：

<html>
<body>
<?php
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called a
$a = round(4.273645,2);
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called b
$b = round(7.45567,2);
#round function is used on the given floating point number to round to up to three decimal values and is stored in a variable called c
$c = round(9.3778335,2);
#The result after using the round function is displayed as the output on the screen
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $a;
echo "<br>";
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $b;
echo "<br>";
echo("The value after the given floating point number is rounded to the nearest integer is: ");
echo $c;
echo "<br>";
?>
</body>
</html>

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輸出：

PHP回合