How to divide and round in php

Methods for division and rounding in php: 1. Use the [round()] function to round floating point numbers; 2. Use the [ceil()] function to round up to the nearest integer; 3. Use The [floor()] function rounds down to the nearest integer.

How to divide and round in php:

1. round: rounding

round()The function rounds floating point numbers.

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

Tip: PHP cannot handle strings like "12,300.2" correctly by default.

Example:

<?php
echo(round(0.60));
echo(round(0.50));
echo(round(0.49));
echo(round(-4.40));
 echo(round(-4.60));
 ?>

Output:

1 1
2 1
3 0
4 -4
5 -5

2. ceil: round up

ceil() function rounds up is the nearest integer.

Description: Return the next integer that is not less than x. If x has a decimal part, it will be rounded up by one. The type returned by ceil() is still float because the range of float values ​​is usually larger than that of integer.

Example:

 <?php
 echo(ceil(0.60);
 echo(ceil(0.40);
 echo(ceil(5);
echo(ceil(5.1);
 echo(ceil(-5.1);
 echo(ceil(-5.9));
 ?>

Output:

1 1
2 1
3 5
4 6
5 -5
6 -5

3. floor: round down

floor() function down Rounded to the nearest integer.

Syntax: floor(x)

Description: Return the next integer not greater than x, and round off the decimal part of x. The type returned by floor() is still float because the range of float values ​​is usually larger than that of integer.

Example:

<?php
echo(floor(0.60));
echo(floor(0.40));
echo(floor(5));
echo(floor(5.1));
echo(floor(-5.1));
 echo(floor(-5.9))
 ?>

Output:

1 0
2 0
3 5
4 5
5 -6
6 -6

Related learning recommendations: php programming (video)

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