曾銘祥Python與Javascript與EXCEL IRR函數比較
嵌入影片 pmt = [0,0,0,0] #曾銘祥程式設計586設定串列list pmt[0]=float(input('躉繳金額: '))#Floot函數轉化為實數 for nper in range(1,4): pmt[nper] = float(input('第'+str(nper)+'期回收: ')) def npv(rate): y = - pmt[0] for j in range(1,4): y = y + pmt[j]/(1+rate)**j return y a, b, gap, f = 0.0, 1.0, 9.0, 9.0 maxerror = 0.000001 loopNumber = 1 while (gap > maxerror and abs(f) > maxerror and loopNumber maxerror and gap > maxerror): if ( f>0 ): a = c else: b = c gap = b-a; print('曾銘祥報酬率: ', c) print('曾銘祥淨現值: ', f) print('曾銘祥迴圈次數: ', loopNumber) https://zh.wikipedia.org/wiki/%E4%BA%8C%E5%88%86%E6%B3%95_(%E6%95%B8%E5%AD%B8)