Texas Instruments TINSPIRE Reference Guide - Page 55

iPart( ) iPart(Number) ⇒ integer iPart(List1) ⇒ list iPart(Matrix1) ⇒ matrix Returns the integer part of the argument. For lists and matrices, returns the integer part of each element. The argument can be a real or a complex number. Catalog > irr() irr(CF0,CFList [,CFFreq]) ⇒ value Financial function that calculates internal rate of return of an investment. CF0 is the initial cash flow at time 0; it must be a real number. CFList is a list of cash flow amounts after the initial cash flow CF0. CFFreq is an optional list in which each element specifies the frequency of occurrence for a grouped (consecutive) cash flow amount, which is the corresponding element of CFList. The default is 1; if you enter values, they must be positive integers < 10,000. Note: See also mirr(), page 63. Catalog > isPrime() Catalog > isPrime(Number) ⇒ Boolean constant expression Returns true or false to indicate if number is a whole number | 2 that is evenly divisible only by itself and 1. If Number exceeds about 306 digits and has no factors {1021, isPrime(Number) displays an error message. Function to find the next prime after a specified number: Note for entering the example: In the Calculator application @ on the handheld, you can enter multi-line definitions by pressing · instead of at the end of each line. On the computer keyboard, hold down Alt and press Enter. isVoid() isVoid(Var) ⇒ Boolean constant expression isVoid(Expr) ⇒ Boolean constant expression isVoid(List) ⇒ list of Boolean constant expressions Returns true or false to indicate if the argument is a void data type. For more information on void elements, see page 131. Catalog > TI-Nspire™ Reference Guide 49