To find the character in a string in Python: Use the find() method to find the index of the first occurrence of the supplied character in the input String. Use an if statement to check if the returned index is not -1; if so, print that index; otherwise, print an error. Use find(...
python之string模块的find 函数原型:find(str,pos_start,pos_end) 解释:str:被查找“字串”(气味字符串的函数);pos_start:查找的首字母位置(从0开始计数。默认:0);pos_end:查找的末 尾位置(不包括末尾位置。默认-1) 返回值:如果查到:返回查找的第一个出现的额位置,否则,返回-1。 例: >>> a='habdl'...
#include<iostream> using namespace std; int getLastIndex(string& str, char ch) { for (int i = str.length() - 1; i >= 0; i--) if (str[i] == ch) return i; return -1; } int main() { string str = "hello"; char ch = 'l'; int index = getLastIndex(str, ch); if...
publicclassFindCharacterInString{publicstaticvoidmain(String[]args){Stringstr="Hello, World!";// 定义字符串charch='o';// 定义要查找的字符intindex=str.indexOf(ch);// 使用indexOf()查找字符if(index!=-1){System.out.println("字符 '"+ch+"' 在字符串中的位置是:"+index);}else{System.out....
C++ program to find the last index of a character in a string#include <iostream> #include <string.h> using namespace std; //function to get lastt index of a character int getLastIndex(char *s, char c) { int length; int i; //loop counter //get length length = strlen(s); //...
print(find_Index("Python Exercises", "yt")) print(find_Index("Python Exercises", "PY")) Sample Output: 7 1 Not found Flowchart: For more Practice: Solve these Related Problems: Write a Python program to find the starting index of a given substring in a string and return "Not found" ...
# Python program to find the# maximum frequency character in the string# Getting string input from the usermyStr=input('Enter the string : ')# Finding the maximum frequency character of the stringfreq={}foriinmyStr:ifiinfreq:freq[i]+=1else:freq[i]=1maxFreqChar=max(freq,key=freq.get)...
Python Find String in List usingcount() We can also usecount()function to get the number of occurrences of a string in the list. If its output is 0, the string is not present in the list. l1=['A','B','C','D','A','A','C']s='A'count=l1.count(s)ifcount>0:print(f'{...
#例子:target='www.163.com'print(target.find('163'))iftarget.find('263')==-1:print('263不存在于字符串'+target+'中') 运行: C:\Users\horn1\Desktop\python\7>python find.py4263不存在于字符串www.163.com中 当然,如果仅仅是字符串里是否存在子串的话,使用 in 和 not in 操作符更好。
1. Usingstring::rfind The standard approach to find the index of the last occurrence of a char in a string is using thestring::rfindmember function. If the character doesn’t occur in the string, the function returnsstring::npos.