CASTI-89 TITANIUM (FINANCE APP) · CALC89
ΣInt(
Returns the total interest paid over a range of loan payments.
Syntax
ΣInt(NPmt1, NPmt2, N, I, PV[, Pmt[, FV[, PpY[, CpY[, PmtAt[, roundValue]]]]]])
- Group
- Finance
- Arguments
- Takes the first and last payment number, N, I, PV and optional Pmt, FV, payments per year, compounding periods per year, payment timing and rounding.
- Availability
- Pro feature in Calc89
- Menu path
- APPS ▸ Finance ▸ CALC ▸ ΣInt(
- Origin
- On the TI-89 Titanium this command comes with the preinstalled Finance app
Example
| Input | Result |
|---|---|
| ΣInt(1,3,12,4.75,20000,,12,12) | −213.48 |
Typing ΣInt(1,3,12,4.75,20000,,12,12) on the home screen and pressing ENTER returns −213.48.
Keystrokes on the TI-89 Titanium
APPS9▼×10ENTER
The same key sequence inserts ΣInt( in Calc89, and the AI tutor shows it step by step on the on-screen keypad.
Related commands
- ΣPrn(Returns the total principal paid over a range of loan payments.
- amortTbl(Returns an amortization table as a matrix, with payment number, interest, principal and balance for each payment.
- bal(Returns the remaining loan balance after a given payment.
- dbd(Returns the number of days between two dates.
- eff(Converts a nominal annual interest rate into the effective annual rate.
- irr(Returns the internal rate of return of a series of cash flows, the rate at which the net present value is zero.
- mirr(Returns the modified internal rate of return, which uses separate finance and reinvestment rates.
- nom(Converts an effective annual interest rate into the nominal annual rate.