function nperimport { nper } from "https://dotland.deno.dev/x/financial@v0.1.3/src/financial.ts"; nper(rate: number,pmt: number,pv: number,fv?,when?,): numberCompute the number of periodic payments. Parametersrate: number Rate of interest (per period) pmt: number Payment pv: number Present value optionalfv = [UNSUPPORTED] Future value optionalwhen = [UNSUPPORTED] When payments are due ReturnsnumberThe number of periodic payments