プログラミングが正しく動作しないのはなぜですか？ if文が評価されておらず、Pythonのelse文に直接ジャンプします

Question

opに値を入力しようとすると、常にelse文が実行されます。

ここで問題は何ですか？私はあなたが最初の2つの数字を望んで操作を入力する場合、また、あなたが整数としてtypped番号をキャストする必要があり、正常に動作しているプログラミング

print "Basic Calculator" 
print "Options:" 
print "For addition, type add" 
print "For subtraction, type sub" 
print "For multiplication, type mul" 
print "For division, type div" 

op = raw_input() 
num1 = raw_input("Enter first number: ") 
num2 = raw_input("Enter second number: ") 

if op == 'sum': 
    print "The sum is: ", num1 + num2 
elif op == 'sub': 
    if num1 > num2: 
     print "The subtraction is: ", num1 - num2 
    else: 
     print "The subtraction is: ", num1 - num2 
elif op == 'mul': 
    print "The product is: ", num1 * num2 
elif op == 'div': 
    print "The division is: ", num1/num2 
else: 
    print "You entered an incorrect operation" 

Answer 1

に新しいです：

print "Basic Calculator" 
print "Options:" 
print "For addition, type add" 
print "For subtraction, type sub" 
print "For multiplication, type mul" 
print "For division, type div" 

op = raw_input("Enter the operation wanted (add, sub, mul, div): ") 
num1 = raw_input("Enter first number: ") 
num2 = raw_input("Enter second number: ") 

intNum1 = int(num1) 
intNum2 = int(num2) 
if op == 'sum': 
    print "The sum is: ", intNum1 + intNum2 
elif op == 'sub': 
    if intNum1 > intNum2: 
     print "The subtraction is: ", intNum1 - intNum2 
    else: 
     print "The subtraction is: ", intNum1 - intNum2 
elif op == 'mul': 
    print "The product is: ", intNum1 * intNum2 
elif op == 'div': 
    print "The division is: ", intNum1/intNum2 
else: 
    print "You entered an incorrect operation" 

Try it here