How to perform mathematical operations using PHP built-in functions?

PHP's built-in mathematical functions can perform various operations, including basic arithmetic operations (, -, *, /, %), rounding, integer, absolute value, maximum value, minimum value, power, square root. In practical cases, you can calculate the area of ​​a circle, the average of two numbers, and determine whether a number is even.

How to use PHP built-in functions to perform mathematical operations

PHP provides a series of powerful built-in functions that can be used to perform various computation. This article will introduce the most commonly used functions and their usage, and provide practical cases.

Basic arithmetic operators

Before performing mathematical operations, you need to understand the basic arithmetic operators supported by PHP:

##OperatorDescriptionAddition- Subtraction##*/%**Built-in Math functions

Multiplication
Division
Find remainder
Power

round():

Rounds a number to a specified number of decimal places.

$num = 12.56;
$roundedNum = round($num, 2); // 12.56

floor():

Round the number down.

$num = 12.56;
$flooredNum = floor($num); // 12

ceil():

Round the number up.

$num = 12.56;
$ceilingNum = ceil($num); // 13

abs():

Returns the absolute value (non-negative) of a number.

$num = -12;
$absNum = abs($num); // 12

min():

Returns the minimum value in the given list of numbers.

$nums = [1, 2, 3, 4, 5];
$minNum = min($nums); // 1

max():

Returns the maximum value in the given list of numbers.

$nums = [1, 2, 3, 4, 5];
$maxNum = max($nums); // 5

pow():

Calculates the given number to the specified power.

$num = 2;
$power = 3;
$result = pow($num, $power); // 8

sqrt():

Calculate the square root of the given number.

$num = 16;
$sqrt = sqrt($num); // 4

Practical case

Calculate the area of ​​a circle:

$radius = 5;
$area = pi() * $radius ** 2; // 78.54

Calculate the average of two numbers:

$num1 = 10;
$num2 = 20;
$average = ($num1 + $num2) / 2; // 15

Determine whether a given number is even:

$num = 12;
$isEven = ($num % 2 === 0); // true

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