TI-BASIC:Prod
From Learn @ Cemetech
Jump to navigationJump to search
Command Summary
Calculates the product of all or part of a list.
Command Syntax
prod(list[,start,[end
Menu Location
{{{location}}}
{{{compatibility}}}
{{{size}}}
)
|location=Press:
- 2nd LIST to access the list menu.
- LEFT to access the MATH submenu.
- 6 to select prod(, or use arrows and ENTER.
|compatibility=TI-83/84/+/SE |size=1 byte ]]
The prod( command calculates the product of all or part of a list.
When you use it with only one argument, the list, it multiplies all the elements of the list. You can also give it a bound of start and end and it will only multiply the elements starting and ending at those indices (inclusive).
prod({1,2,3,4,5})
120
prod({1,2,3,4,5},2,4)
24
prod({1,2,3,4,5},3)
60
Optimization
If the value of end is the last element of the list, it can be omitted:
prod({1,2,3,4,5},3,5)
can be
prod({1,2,3,4,5},3)
Error Conditions
- ERR:DOMAIN if the starting or ending value aren't positive integers.
- ERR:INVALID DIM if the starting or ending value exceed the size of the list, or are in the wrong order.
