PHP's entire function: ceil, floor, round, intval

The following describes in detail the differences among the integer functions in PHP: ceil, floor, round, and intval. if you need a friend, you can refer to the PHP integer function that we often use, mainly: ceil, floor, round, intval.

Ceil -- integer in a single method
Description
Float ceil (float value)

Returns the next integer of no less than value. if the value has a decimal part, it is entered in one place. The type returned by ceil () is still float, because the float value range is usually larger than integer.

Example 1. ceil () of the PHP function

The code is as follows:

<? Php echo ceil (4.3 );
// 5 echo ceil (9.999 );
// 10
?>

Floor -- rounding to get an integer
Description
Float floor (float value)

Returns the next integer not greater than value and rounds the decimal part of value. The return type of floor () is still float, because the float value range is usually larger than that of integer.

Example 1. floor () example

The code is as follows:

<?
Php echo floor (4.3 );
// 4 echo floor (9.999 );
// 9
?>

Round -- rounds a floating point number
Description

The code is as follows:

Float round (float val [, int precision])

Returns the result of rounding val by the specified precision (number of digits after decimal point. Precision can also be negative or zero (default ).

Example 1. round ()

The code is as follows:

<?
Php echo round (3.4 );
// 3 echo round (3.5 );
// 4 echo round (3.6 );
// 4 echo round (3.6, 0 );
// 4 echo roround (1.95583, 2 );
// 1.96 echo round (1241757,-3 );
// 1242000 echo round (5.045, 2 );
// 5.05 echo round (5.055, 2 );
// 5.06
?>

Intval --- convert a variable to an integer type
Example of using the entire function in PHP: intval ()

The code is as follows:

<?
Php echo intval (4.3 );
// 4 echo intval (4.6 );
// 4
?>