爲什麼我的嵌套while循環無法正常工作

Question

在Python中使用程序打印出前1000個素數（2除外）。所有我能得到的輸出是數字3.不明白我的循環結束的地點或時間。在編程方面非常新穎。任何人都可以幫忙嗎？

primeCounter = 1 
candidate = 3 

while primeCounter < 1000: 
    isPrime = True 
    counter = 2 
    while counter < candidate: 
     if candidate%counter == 0: 
      isPrime = False 
     else: 
      counter = counter + 1 

    if isPrime == True: 
     print candidate 
     primeCounter = primeCounter + 1 

    candidate = candidate + 1 

Answer 1

primeCounter = 1 
candidate = 3 

while primeCounter < 1000: 
    isPrime = True 
    counter = 2 
    while counter < candidate: 
     if candidate%counter == 0: 
      isPrime = False 
      break # <<<<<<<<<<<<<<<<< break here, or the loop will go infinite 
     else: 
      counter = counter + 1 

    if isPrime == True: 
     print candidate 
     primeCounter = primeCounter + 1 

    candidate = candidate + 1 

Answer 2

一旦您設置isPrime到False，你不會再增加counter，這樣你就永遠走不出內while循環。

Answer 3

你在塊

while counter < candidate: 
    if candidate%counter == 0: 
     isPrime = False 

問題，如果沒有候選人％計，你得到無限循環。