How can PHP developers effectively leverage PHP's built-in functions and libraries for numerical operations?

PHP developers can effectively leverage PHP's built-in functions and libraries for numerical operations by familiarizing themselves with functions such as `abs()`, `round()`, `min()`, `max()`, `sqrt()`, and `pow()`. Additionally, PHP's `math` extension provides more advanced mathematical functions for complex numerical operations. By utilizing these built-in functions and libraries, developers can efficiently perform calculations and manipulate numerical data in their PHP applications.

// Example of using built-in PHP functions for numerical operations
$num1 = 10;
$num2 = -5;

// Absolute value
echo abs($num2); // Output: 5

// Rounding
echo round($num1 / 3, 2); // Output: 3.33

// Minimum and maximum
echo min($num1, $num2); // Output: -5
echo max($num1, $num2); // Output: 10

// Square root
echo sqrt($num1); // Output: 3.1622776601684

// Power
echo pow($num1, 2); // Output: 100