PHP is_float() Function

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PHP is_float() is an inbuilt function in PHP. The is_float() function is used to find whether a variable is a float or not.

Syntax:

 boolean  is_float($variable_name)

Parameter: This function contains a single parameter as shown in the above syntax and described below

$variable_name: the variable we want to check.

Return value: It is a boolean function so returns TRUE when $variable_name is an integer, otherwise FALSE.

The below example illustrates the working of the function is_float().

Example 1:

PHP

<?php
 
// php code demonstrate working of is_float()
$variable_name1 = 67.099;
$variable_name2 = 32;
$variable_name3 = "abc";
$variable_name4 = FALSE;
 
// $variable_name1 is float, gives TRUE
if (is_float($variable_name1))
    echo "$variable_name1 is a float value. \n";
else
    echo "$variable_name1 is not a float value. \n";
 
// $variable_name2 is not float, gives FALSE
if (is_float($variable_name2))
    echo "$variable_name2 is a float value. \n";
else
    echo "$variable_name2 is not a float value. \n";
 
// $variable_name3 is not float, gives FALSE
if (is_float($variable_name3))
    echo "$variable_name3 is a float value. \n";
else
    echo "$variable_name3 is not a float value. \n";
 
// $variable_name4 is not float, gives FALSE
if (is_float($variable_name4))
    echo "FALSE is a float value. \n";
else
    echo "FALSE is not a float value. \n";
?>

Output:

67.099 is a float value. 
32 is not a float value. 
abc is not a float value. 
FALSE is not a float value.

Example 2:

PHP

<?php
// PHP code demonstrate working of is_float()
 
function square($num)
{
    return (is_float($num));
}
 
echo square(9.09) ."\n";  // outputs '1'.
echo square(FALSE) ."\n"; // gives no output.
echo square(14) ."\n";    // gives no output.
echo square(56.30) ."\n";  // outputs '1'
 
?>