Sum Float

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Returns the float sum of the values of the given Traversable

namespace HH\Lib\Math;

function sum_float<T as num>(
  Traversable<T> $traversable,
): float;

For an integer sum, see Math\sum().

Parameters

• Traversable<T>$traversable

Returns

• float

Examples

$v = vec[2.3, 1, 4.15];
$sum = Math\sum_float($v);
echo "Float sum of array is $sum \n";