pmt = [0,0,0,0] #周偉玲程式設計586設定串列list
pmt[0]=float(input('躉繳金額: '))#float函數轉化為實數(浮點數)
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 < 100):
loopNumber+=1
c = (a+b)/2;
f = npv(c);
if ( abs(f) > maxerror and gap > maxerror):
if ( f>0 ):
a = c
else:
b = c
gap = b-a;
print('周偉玲報酬率: ', c)
print('周偉玲淨現值: ', f)
print('周偉玲迴圈次數: ', loopNumber)
def computePV(): #python def函數: {} r = float(input('輸入利率: '))#float轉為實數 n = float(input('輸入期數: ')) m = float(input('輸入每期金額: ')) f = float(input('輸入終值: ')) pvif = 1/(1+r)**n pv = (1-pvif)*m/r + f * pvif print('現值等於 ',pv) #前面我們用Javascript這裡python #function: def #{區段} 同一個縮排indent同一個區段 computePV()
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