TI-BASIC:Sum

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SUM.GIF

Command Summary

Calculates the sum of all or part of a list.

Command Syntax

sum(list[,start,[end

Menu Location

{{{location}}}

Calculator Compatibility

{{{compatibility}}}

Token Size

{{{size}}}

)

|location=Press:

  1. 2nd LIST to access the list menu.
  2. LEFT to access the MATH submenu.
  3. 5 to select sum(, or use arrows and ENTER.

|compatibility=TI-83/84/+/SE |size=1 byte ]]

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.

Related Commands