PHP is_float() Function
Last Updated :
11 Jul, 2025
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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 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";
?>
<?php// php code demonstrate working of is_float()$variable_name1 = 67.099;$variable_name2 = 32;$variable_name3 = "abc";$variable_name4 = FALSE;// $variable_name1 is float, gives TRUEif (is_float($variable_name1)) echo "$variable_name1 is a float value. \n";else echo "$variable_name1 is not a float value. \n";// $variable_name2 is not float, gives FALSEif (is_float($variable_name2)) echo "$variable_name2 is a float value. \n";else echo "$variable_name2 is not a float value. \n";// $variable_name3 is not float, gives FALSEif (is_float($variable_name3)) echo "$variable_name3 is a float value. \n";else echo "$variable_name3 is not a float value. \n";// $variable_name4 is not float, gives FALSEif (is_float($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 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'
?>
<?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'?>Output:
1 1
Reference: https://www.php.net/manual/en/function.is-float.php
