bcround

    (PHP 8 >= 8.4.0)

    bcround — Round arbitrary precision number

    Descripción

    bcround(string $num, int $precision = 0, RoundingMode $mode = RoundingMode::HalfAwayFromZero): string

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

    Parámetros

    val

    El valor a redondear

    precision

    Opcionalmente, el número de dígitos decimales a redondear.

    mode
    Specifies the rounding mode.

    Valores devueltos

    Returns a numeric string representing num rounded to the given precision.

    Errores/Excepciones

    This function throws a ValueError in the following cases:

    • num is not a well-formed BCMath numeric string.
    • scale is outside the valid range.

    Ejemplos

    Ejemplo #1 bcround() examples

    <?php
    var_dump    (bcround('3.4'));
    var_dump(bcround('3.5'));
    var_dump(bcround('3.6'));
    var_dump(bcround('3.6', 0));
    var_dump(bcround('5.045', 2));
    var_dump(bcround('5.055', 2));
    var_dump(bcround('345', -2));
    var_dump(bcround('345', -3));
    var_dump(bcround('678', -2));
    var_dump(bcround('678', -3));
    ?>

    El resultado del ejemplo sería:

    string(1) "3"
string(1) "4"
string(1) "4"
string(1) "4"
string(4) "5.05"
string(4) "5.06"
string(3) "300"
string(1) "0"
string(3) "700"
string(4) "1000"

    Ejemplo #2 Example of using bcround() with different precision values

    <?php
    $number     = '123.45';

    var_dump(bcround($number, 3));
    var_dump(bcround($number, 2));
    var_dump(bcround($number, 1));
    var_dump(bcround($number, 0));
    var_dump(bcround($number, -1));
    var_dump(bcround($number, -2));
    var_dump(bcround($number, -3));
    ?>

    El resultado del ejemplo sería:

    string(7) "123.450"
string(6) "123.45"
string(5) "123.5"
string(3) "123"
string(3) "120"
string(3) "100"
string(1) "0"

    Ejemplo #3 Example of using bcround() with different mode values

    <?php
    echo 'Rounding modes with 9.5' . PHP_EOL;
    var_dump(bcround('9.5', 0, RoundingMode::HalfAwayFromZero));
    var_dump(bcround('9.5', 0, RoundingMode::HalfTowardsZero));
    var_dump(bcround('9.5', 0, RoundingMode::HalfEven));
    var_dump(bcround('9.5', 0, RoundingMode::HalfOdd));
    var_dump(bcround('9.5', 0, RoundingMode::TowardsZero));
    var_dump(bcround('9.5', 0, RoundingMode::AwayFromZero));
    var_dump(bcround('9.5', 0, RoundingMode::NegativeInfinity));
    var_dump(bcround('9.5', 0, RoundingMode::PositiveInfinity));

    echo     PHP_EOL;
    echo     'Rounding modes with 8.5' . PHP_EOL;
    var_dump(bcround('8.5', 0, RoundingMode::HalfAwayFromZero));
    var_dump(bcround('8.5', 0, RoundingMode::HalfTowardsZero));
    var_dump(bcround('8.5', 0, RoundingMode::HalfEven));
    var_dump(bcround('8.5', 0, RoundingMode::HalfOdd));
    var_dump(bcround('8.5', 0, RoundingMode::TowardsZero));
    var_dump(bcround('8.5', 0, RoundingMode::AwayFromZero));
    var_dump(bcround('8.5', 0, RoundingMode::NegativeInfinity));
    var_dump(bcround('8.5', 0, RoundingMode::PositiveInfinity));
    ?>

    El resultado del ejemplo sería:

    Rounding modes with 9.5
string(2) "10"
string(1) "9"
string(2) "10"
string(1) "9"
string(1) "9"
string(2) "10"
string(1) "9"
string(2) "10"

Rounding modes with 8.5
string(1) "9"
string(1) "8"
string(1) "8"
string(1) "9"
string(1) "8"
string(1) "9"
string(1) "8"
string(1) "9"

    Ejemplo #4 Example of using bcround() with different mode values when specifying precision

    <?php
    echo 'Using RoundingMode::HalfAwayFromZero with 1 decimal digit precision' . PHP_EOL;
    var_dump(bcround( 1.55, 1, RoundingMode::HalfAwayFromZero));
    var_dump(bcround(-1.55, 1, RoundingMode::HalfAwayFromZero));

    echo     PHP_EOL;
    echo     'Using RoundingMode::HalfTowardsZero with 1 decimal digit precision' . PHP_EOL;
    var_dump(bcround( 1.55, 1, RoundingMode::HalfTowardsZero));
    var_dump(bcround(-1.55, 1, RoundingMode::HalfTowardsZero));

    echo     PHP_EOL;
    echo     'Using RoundingMode::HalfEven with 1 decimal digit precision' . PHP_EOL;
    var_dump(bcround( 1.55, 1, RoundingMode::HalfEven));
    var_dump(bcround(-1.55, 1, RoundingMode::HalfEven));

    echo     PHP_EOL;
    echo     'Using RoundingMode::HalfOdd with 1 decimal digit precision' . PHP_EOL;
    var_dump(bcround( 1.55, 1, RoundingMode::HalfOdd));
    var_dump(bcround(-1.55, 1, RoundingMode::HalfOdd));

    echo     PHP_EOL;
    echo     'Using RoundingMode::TowardsZero with 1 decimal digit precision' . PHP_EOL;
    var_dump(bcround( 1.55, 1, RoundingMode::TowardsZero));
    var_dump(bcround(-1.55, 1, RoundingMode::TowardsZero));

    echo     PHP_EOL;
    echo     'Using RoundingMode::AwayFromZero with 1 decimal digit precision' . PHP_EOL;
    var_dump(bcround( 1.55, 1, RoundingMode::AwayFromZero));
    var_dump(bcround(-1.55, 1, RoundingMode::AwayFromZero));

    echo     PHP_EOL;
    echo     'Using RoundingMode::NegativeInfinity with 1 decimal digit precision' . PHP_EOL;
    var_dump(bcround( 1.55, 1, RoundingMode::NegativeInfinity));
    var_dump(bcround(-1.55, 1, RoundingMode::NegativeInfinity));

    echo     PHP_EOL;
    echo     'Using RoundingMode::PositiveInfinity with 1 decimal digit precision' . PHP_EOL;
    var_dump(bcround( 1.55, 1, RoundingMode::PositiveInfinity));
    var_dump(bcround(-1.55, 1, RoundingMode::PositiveInfinity));
    ?>

    El resultado del ejemplo sería:

    Using RoundingMode::HalfAwayFromZero with 1 decimal digit precision
string(3) "1.6"
string(4) "-1.6"

Using RoundingMode::HalfTowardsZero with 1 decimal digit precision
string(3) "1.5"
string(4) "-1.5"

Using RoundingMode::HalfEven with 1 decimal digit precision
string(3) "1.6"
string(4) "-1.6"

Using RoundingMode::HalfOdd with 1 decimal digit precision
string(3) "1.5"
string(4) "-1.5"

Using RoundingMode::TowardsZero with 1 decimal digit precision
string(3) "1.5"
string(4) "-1.5"

Using RoundingMode::AwayFromZero with 1 decimal digit precision
string(3) "1.6"
string(4) "-1.6"

Using RoundingMode::NegativeInfinity with 1 decimal digit precision
string(3) "1.5"
string(4) "-1.6"

Using RoundingMode::PositiveInfinity with 1 decimal digit precision
string(3) "1.6"
string(4) "-1.5"

    Ver también

    • bcceil() - Round up arbitrary precision number
    • bcfloor() - Round down arbitrary precision number

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