Property	Value
Hex Value	`$B6`
Categories	Catalog > S List > Math
Localizations	FR: `somme(`

`sum(`

Overview

Returns the sum of elements of list from start to end.

Availability: Token available everywhere.

Syntax

sum(list[,start,end])

Arguments

Name	Type	Optional
list	list
start		Yes
end		Yes

Location

2nd, list, MATH, 5:sum(

Description

The sum( command calculates the sum of all or part of a list.

When you use it with only one argument, the list, it sums up all the elements of the list. You can also give it a bound of start and end and it will only sum up the elements starting and ending at those indices (inclusive).

sum({1,2,3,4,5})
    15
sum({1,2,3,4,5},2,4)
    9
sum({1,2,3,4,5},3)
    12

Optimization

If the value of end is the last element of the list, it can be omitted:

sum({1,2,3,4,5},3,5)
can be
sum({1,2,3,4,5},3)

Error Conditions

ERR:DOMAIN is thrown if the starting or ending value aren't positive integers.
ERR:INVALID DIM is thrown if the starting or ending value exceed the size of the list, or are in the wrong order.

Source: parts of this page were written by the following TI|BD contributors: burr, DarkerLine, GoVegan.

History

Calculator	OS Version	Description
TI-82	1.0	`sum` added
TI-83	0.01013	Renamed `sum` to `sum(`

Authors: Adrien Bertrand

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