python - 変数名で構文エラーが発生する (Python)

Question

私が作成した簡単なプログラムに問題があります。

num2 = 0
num1 = 1
print ("Enter a number one after another to sum them up, and when you're done type 0")
while num1 != 0:
    num1 = float(raw_input ("Please enter a number:")
    num2 += num1
if num1 == 0:
    print ("The sum of the numbers is:" + str(num2))

何らかの理由で、この行num2 += num1で構文エラーが表示されnum2ます。

Answer 1

num = (int(input('pick a number to find if it is prime')
div = 2
while num !% div or div != num-1 
    f=num/div
    if num % div :
        print('no as ' ,num, 'is divisible by ',div)
        div = 2
    else:
        div=div+1