PHP Numbers: Working with Integers and Floats in PHP

Numbers are a data type used for mathematical calculations and numerical data processing. PHP supports different types of numbers, such as integers, floating-point numbers (floats), and provides a wide range of functions to perform mathematical operations.

Types of Numbers in PHP

Type	Description	Example
Integer	Whole numbers (positive or negative) without decimals	10, -5, 1000 Try it yourself
Float (Double)	Numbers with decimals	10.5, -3.14, 2.718 Try it yourself
Infinity	Special value for numbers too large	1.9e308 Try it yourself
NaN (Not a Number)	Used for invalid calculations	sqrt(-8) Try it yourself
Numeric Strings	Strings containing numbers that can be used in calculations	"100", "3.14" Try it yourself

PHP Casting Strings (Type casting)

PHP offers various ways to cast a numerical value into another data type.

The(int), (integer), and intval() functions are often used to convert a value to an integer.

Example

<!DOCTYPE html>

<html>

<body>

<?php

$str = "123.45";

$intValue = (int)$str; // Converts to integer (123)

$floatValue = (float)$str; // Converts to float (123.45)

echo $intValue."<br>";

echo $floatValue;

</body>

</html>

Try it yourself

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