PHP Numbers

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Table of Contents

• PHP Numbers
  • PHP Number
    • Example 1
  • PHP 2
    • Example 2
  • PHP Float
    • Example 3
  • PHP Infinity
    • Example 4
  • PHP NaN
    • Example 5
  • PHP 1
    • Example 6
  • Document
  • Reference

PHP Number

<h4>php-number</h2>
<p>There are three main numeric types in PHP: Integer, Float, Number Strings</p>
<p>In addition, PHP has two more data types used for numbers:Infinity, NaN</p>
<?php
    $a = 5;
    $b = 5.34;
    $c = "25";

    var_dump($a);       // Result: int(5)
    echo "<br>";
    var_dump($b);       // Result: float(5.34)
    echo "<br>";
    var_dump($c);       // Result: string(2) "25"
?>

Example 1

Result View Example

PHP 2

<h4>php-number-Integers</h2>
<p>An integer data type is a non-decimal number between -2147483648 and 2147483647 in 32 bit systems, and between -9223372036854775808 and 9223372036854775807 in 64 bit systems. A value greater (or lower) than this, will be stored as float, because it exceeds the limit of an integer.</p>
<?php
  // Check if the type of a variable is integer   
  $x = 5985;
  var_dump(is_int($x));   // Result: bool(true)   

  echo "<br>";

  // Check again... 
  $x = 59.85;
  var_dump(is_int($x));  // Result: bool(false)
?>  

Example 2

Result View Example

PHP Float

<h4>php-number-float</h2>
<p>A float is a number with a decimal point or a number</p>

<?php
// Check if the type of a variable is float 
$x = 10.365;
var_dump(is_float($x));     // Result: bool(true)
?>  

Example 3

Result View Example

PHP Infinity

<h4>php-number infinity</h4>
<p>There are three main numeric types in PHP:</p>

<?php
// Check if a numeric value is finite or infinite 
$x = 1.9e411;
var_dump($x);   // Result: float(INF)
?>

Example 4

Result View Example

PHP NaN

NaN stands for Not a Number.

NaN is used for impossible mathematical operations.

PHP has the following functions to check if a value is not a number:

• is_nan() However, the PHP var_dump() function returns the data type and value:

<h4>NaN</h4>
<p>Invalid calculation will return a NaN value:</p>

<?php
// Invalid calculation will return a NaN value
$x = acos(1.01);
var_dump($x);       // Result: float(NAN)

Example 5

Result View Example

PHP 1

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Example 6

Result View Example

Document

Document in project

You can Download PDF file.

Reference