Question

当我运行此代码时，它仍会显示＆＃34;搜索失败＆＃34;消息，任何人都可以帮我找出原因吗？我知道它有一个循环，但是一旦它找到了句子中单词的所有位置，我就无法弄清楚如何使代码停止循环。

    sentence= "the hat ran away from the cat"
    print(sentence)
    word_to_find= input("write word from sentence")
    senLow= sentence.lower()
    word= word_to_find.lower() 
    senList= senLow.split()

    for pos in range(len(senList)):
        if word== senList[pos]:
            print(word, "found in position:", pos+1)

    else :
       print ("search unsuccessful")

Answer 1

试试这个：

sentence = "the hat ran away from the cat"
print(sentence)
word_to_find = input("write word from sentence")
senLow = sentence.lower()
word = word_to_find.lower()
senList = senLow.split()
found = False
for pos in range(len(senList)):
    if word == senList[pos]:
        print(word, "found in position:", pos+1)
        found = True

if not found:
    print ("seacrh unsuccessful")

我添加了一个标记＆＃39;发现＆＃39;如果在句子中出现单词，则将设置为true，否则“seacrh notccessful”＃39;将打印。

带有for循环的代码和显示错误消息的if语句

1 个答案: