$sum[]

The function $sum[] adds up all numerical values passed to it. It is variadic, meaning it accepts an unlimited number of arguments.

Syntax

$sum[value1;value2;...]

Parameters

Parameter	Type	Required	Description
values	number	Yes	List of numerical values separated by ;. Variadic.

Behavior

• Adds all values in the order they are provided.
• If no value is passed, it returns 0.
• Non-numerical values are ignored or converted to 0 depending on the context.
• Supports decimal numbers.

Examples

Simple sum:

$sum[5;10;15]
→ 30

With a single value:

$sum[42]
→ 42

Without arguments:

$sum[]
→ 0

In a practical context (cart total):

$sum[$getVar[item1];$getVar[item2];$getVar[item3]]

Notes

• The result is always a string of characters representing a number.
• For more complex operations, use $calculate[].
• Semicolons ; are required as separators.