In php, the division method (round, ceil, floor) and ceilfloor

In php, the division method (round, ceil, floor) and ceilfloor

In PHP, you need to use the following method to get the result of division:

1. round: Rounding

The round () function rounds a floating point number.

Syntax: round (x, prec)

Parameters	Description
X	Optional. Specifies the number to be rounded.
Prec	Optional. Specifies the number of digits after the decimal point.

Returns the result of rounding x to the specified precision prec (number of digits after decimal point. Prec can also be a negative number or zero (default ).

Tip: by default, PHP cannot correctly process strings similar to "12,300.2.

Example:

1 <?php2 echo(round(0.60));3 echo(round(0.50));4 echo(round(0.49));5 echo(round(-4.40));6 echo(round(-4.60));7 ?>

Output:

1 12 13 04 -45 -5

 

2. ceil: rounded up

The ceil () function rounds up to the nearest integer.

Syntax: ceil (x)

Parameters	Description
X	Required. Specifies the number to be rounded.

Description: return the next integer not less than x. If x has a decimal part, the return value is one digit. The type returned by ceil () is still float, because the float value range is usually larger than integer.

Example:

1 <?php2 echo(ceil(0.60);3 echo(ceil(0.40);4 echo(ceil(5);5 echo(ceil(5.1);6 echo(ceil(-5.1);7 echo(ceil(-5.9));8 ?>

Output:

1 12 13 54 65 -56 -5

 

3. floor: round down

The floor () function rounds down to the nearest integer.

Syntax: floor (x)

Parameters	Description
X	Required. Specifies the number to be rounded.

Note: the return value is the next integer not greater than x, and the decimal part of x is rounded out. The return type of floor () is still float, because the float value range is usually larger than that of integer.

Example:

1 <?php2 echo(floor(0.60));3 echo(floor(0.40));4 echo(floor(5));5 echo(floor(5.1));6 echo(floor(-5.1));7 echo(floor(-5.9))8 ?>

Output:

1 02 03 54 55 -66 -6