round() - math

Returns the rounded value of val to
   specified precision
   (number of digits after the decimal point).
   precision can also be negative or zero (default).

Parameters : 
 val - The value to round 
 precision - The optional number of decimal digits to round to. 
 mode - Use one of the following constants to specify the mode in which rounding occurs.
       


Constant
Description




PHP_ROUND_HALF_UP

            Round val up to precision decimal places
            away from zero, when it is half way there. Making 1.5 into 2 and -1.5 into -2.
           


PHP_ROUND_HALF_DOWN

            Round val down to precision decimal places
            towards zero, when it is half way there. Making 1.5 into 1 and -1.5 into -1.
           


PHP_ROUND_HALF_EVEN

            Round val to precision decimal places
            towards the next even value.
           


PHP_ROUND_HALF_ODD

            Round val to precision decimal places
            towards the next odd value. 

Syntax

float round
     ( float $val
    [, int $precision = 0
    [, int $mode = PHP_ROUND_HALF_UP
   ]] )

Example

<?phpecho round(3.4);         // 3echo round(3.5);         // 4echo round(3.6);         // 4echo round(3.6, 0);      // 4echo round(1.95583, 2);  // 1.96echo round(1241757, -3); // 1242000echo round(5.045, 2);    // 5.05echo round(5.055, 2);    // 5.06?>

Output / Return Value

Limitations

Alternatives / See Also

Reference