Std.List.sum

fn

This is a callable function.

What it does

The sum of every element, or None for an empty array.

Generic over any type with an additive identity and an addition, which is

every integer width and both floating widths.

Read the signature

• The text after the name is the type checked by Pudu.
• Read arrows from left to right: inputs come first, and the final type is returned.
• & borrows a value for this call instead of moving or copying it.
• Names inside [ ] are type arguments, such as the item type held by a collection.
• Option holds Some(value) or None when no value is available.