Introduction

The task is check whether the strings start character and end character is same or not.

Program

import re 
def check_str(ip_str):
    re_exp = r'^[a-z]$|^([a-z]).*\1$'
 
    if(re.search(re_exp, ip_str)):   
        print("The input string {0} starts and ends with same character!".format(ip_str))   
    else:   
        print("The input string {0} does not starts and ends with same character!".format(ip_str))
        
ip_str = input("Enter the string: ")
check_str(ip_str)

Output

Explanation

In the above python code, we have used regex expression r’^[a-z]$|^([a-z]).*\1$’. For single characters, the regex expression is r’^[a-z]$ and all the single characters satisfies the given condition. For multiple characters the regex expression is ^([a-z]).*\1$’. We have combined both the expressions in our code and used re.search() function to get the desired result.