# PHP Math Functions

In this lesson, you will learn about PHP Math Functions, their usage, and examples to better understand the topic.

## PHP Math Functions

The math functions are components of the PHP core. Numerous predefined math functions and constants are available in PHP and can be used to carry out mathematical tasks. We can use these functions without any installation.

Here is a collection of the most significant PHP math functions.

Math FunctionDescription
abs()returns a number's absolute (positive) value.
rand()makes an integer at random.
round()a floating-point number is rounded.
sin()returns a number's sine value.
sinh()returns a number's hyperbolic sine.
max()the highest value found in an array or the highest value among several specified values.
min()a function that returns the lowest value in an array or the lowest value among a range of provided values.
is_finite()determines whether or not a value is finite.
is_infinite()determines whether or not a value is infinite.
is_nan()determines if a value is "not-a-number."
bindec()A binary number is changed into a decimal number.
ceil()The closest integer is used to round a number.

### 1 – PHP abs() function

PHP abs() function returns a number’s absolute (positive) value. Letâ€™s see an example below.

Basic syntax

abs(-5)// will return 5

Example

<?php
echo(abs(-8.68)."<br>");
echo(abs(-78.78)."<br>");
echo(abs(-89));
?>

Output

8.68
78.78
89

### 2 – PHP max() and min() functions

To determine the lowest or highest value in a list of inputs, use the min() and max() functions:

Basic syntax

min(1,2,3,4,5); // returns 1
max(1,2,3,4,5); // returns 5

Example

<?php
echo(min(11,22,13,54,95)."<br>"); // returns 11
echo(max(11,22,13,54,-95)); // returns 54
?>

Output

11
54

### 3 – PHP ceil() functions

The closest integer is used to round a number.

Basic syntax

float ceil ( float $variable ) Example <?php echo(ceil(11.234)."<br>"); // returns 12 echo(ceil(-15.24)."<br>"); // returns -15 echo(ceil(81.4)."<br>"); // returns 82 ?> Output 12 -15 82 ### 4 – PHP floor() functions Fractions are rounded down by the floor() function. Basic syntax float floor (float$variable)

Example

<?php
echo(floor(11.234)."<br>"); // returns 11
echo(floor(-15.24)."<br>"); // returns -16
echo(floor(81.4)."<br>"); // returns 81
?>

Output

11
-16
81

This concludes the PHP Math Functions lesson. In the next lesson, you will learn about an important data structure in PHP and programming in general, arrays!