PHP floating point number rounding function_PHP tutorial

This article introduces two commonly used functions for rounding floating point numbers in PHP: round and the ceil function, which may retain the number of decimal places. ​

The round() function rounds floating point numbers

Grammar

float round ( float val [, int precision] )

Returns val rounded to the specified precision (the number of decimal digits after the decimal point). precision can also be negative or zero (default).

round() example

The code is as follows

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代码如下	复制代码
echo round(3.4);             // 3 echo round(3.5);             // 4 echo round(3.6);             // 4 echo round(3.6, 0);         // 4 echo round(1.95583, 2);     // 1.96 echo round(1241757, -3); // 1242000 echo round(5.045, 2);     // 5.05 echo round(5.055, 2);     // 5.06 ?>

echo round(3.4); // 3

echo round(3.5);                              // 4
echo round(3.6);                               // 4
echo round(3.6, 0); // 4
echo round(1.95583, 2); // 1.96

echo round(1241757, -3); // 1242000

echo round(5.045, 2); // 5.05

echo round(5.055, 2); // 5.06

代码如下	复制代码
echo ceil(4.3);     // 5 echo ceil(9.999);     // 10 ?>

?>

ceil -- rounding to the next integer

Description

float ceil (float value) Returns the next integer that is not less than value. If value has a decimal part, it is rounded up. The type returned by ceil() is still float because the range of float values ​​is usually larger than that of integer. Example 1. ceil() example

The code is as follows	Copy code
echo ceil(4.3); // 5 echo ceil(9.999); // 10 ?>

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truehttp: //www.bkjia.com/PHPjc/445302.htmlTechArticleThis article introduces two commonly used functions for rounding floating point numbers in php, round and the ceil function, which may Number of decimal places to keep. The round() function rounds floating point numbers. Syntax...