Python初學者，一個簡單的計算器程序的數學函數

Question

我正在爲一門編程課程做一個基本的計算器，我已經閱讀了PDF的，但我不知道如何製作一個函數，然後用它來打印添加兩個數字的結果。有人可以幫我嗎？

def addition(intFirstOperand, intSecondOperand): 
    addition = intFirstOperand + intSecondOperand 

print ('What mathematical operation would you like to perform? Enter a number:') 
print ('1 - addition') 
print ('2 - subtraction') 
print ('3 - multiplication') 
print ('4 - division') 

intOperation = input() 
intOperation = int(intOperation) 

addition = '1' 
subtraction = '2' 
multiplication = '3' 
division = '4' 

if intOperation == 1 : 
    print ('Please enter the first operand for addition:') 
    intFirstOperand = input() 
    print ('Please enter the second operand for addition:') 
    intSecondOperand = input() 
    print addition(intFirstOperand, intSecondOperand) 

if intOperation == 2 : 
    print ('Please enter the first operand for subtractiom:') 
    intFirstOperand = input() 
    print ('Please enter the second operand for subtraction:') 
    intSecondOperand = input() 

if intOperation == 3 : 
    print ('Please enter the first operand for multiplication:') 
    intFirstOperand = input() 
    print ('Please enter the second operand for multiplication:') 
    intSecondOperand = input() 

if intOperation == 4 : 
    print ('Please enter the first operand for division:') 
    intFirstOperand = input() 
    print ('Please enter the second operand for division:') 
    intSecondOperand = input() 

Answer 1

def addition(intFirstOperand, intSecondOperand): 
    addition = intFirstOperand + intSecondOperand 
    return addition 

你想回到你的計算值。那麼你的打印報告應該工作。

Answer 2

我會建議在你的函數中選擇一個不同的變量名稱，因爲它可能會令人困惑的是具有一個具有相同名稱的函數和變量。您可以選擇從函數內打印，也可以返回一個值，然後在函數外打印返回的值。

def addition(first,second): 
    result = int(first) + int(second) 
    #print result 
    return result 

print(addition(5,3)) #prints 8 in python 3.x 

或者，您可以跳過將值賦給'result'，而只是返回first + second。