A program to calculate effective interest rate (EIR) from given present value and a series of cash flow.
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README.md

README.md

eir-calculator

A program to calculate effective interest rate (EIR) from given present value and a series of cash flow. It's similar to IRR function in Microsoft Excel.

Given the present value and a series of cash flow, we can transform them into a polynomial function. The root of this function is calculated using Newton-Raphson method and then will be used to find the EIR.