Robert is given a string that ends with a character or a number. he has to check the length of the given string and append it to the end in such a way that if the original string ends with a number then the new string with the appended value must have the length of the string as the last two characters. if the string ends with a character then append the total length as the last character. also, the number to be appended must be a single positive digit. write a code to implement the given scenario.

• Single character string: All single character strings satisfies the condition that they start and end with the same character. The regex for a string with only 1 character will be- '^[a-z]$' • Multiple character string: Here we need to check whether the first and the last character is same or not. We do this using \1. The regex will be- '^([a-z]).*\1$' The two regular expressions can be combined using | '^[a-z]$|^([a-z]).*\1$' In this program, we will use search() method of re module. Below is the implementation.

myStr="" In python, every string starts with and ends with quotation marks i.e. single quotes ‘‘, double quotes ”” or triple quotes “””“””. String Manipulation in Python String manipulation in python is the act of modifying a string or creating a new string by making changes to existing strings. To manipulate strings, we can use some of Pythons built-in methods. Create a String in Python To create a string with given characters, you can assign the characters to a variable after enclosing them in double quotes or single quotes as shown below. word = "Hello World" print(word) Output: Hello World In the above example, we created a variable word and assigned the string "Hello World" to the variable. You can observe that the string is printed without the quotation marks when we print it using the print() function. Access Characters in a String in Python To access characters of a string, we can use the [ ] i.e. square brackets to access characters in a string as shown below. word = "Hello World" print("The word is:",word) letter=word[0] print("The letter is:",letter) Output: The word is: Hello World The letter is: H In the above example, we created a string “Hello World” and assigned it to the variable word. Then, we used the letter. Find Length of a String in Python To find the length of a string in Python, we can use the len() function. The len() function takes a string as input argument and returns the length of the string as shown below. word = "Hello World" print("The strin...

• • • • Question:Single File Programming Question Note: This section is language agnostic. You can choose to code in ANY language. There is no necessary advantage to choosing to code in multiple languages. Robert is given a string that ends with a character or a number. He has to check the length of the given string and append it to the end in such a way that if the original Single File Programming Question Note: This section is language agnostic. You can choose to code in ANY language. There is no necessary advantage to choosing to code in multiple languages. Robert is given a string that ends with a character or a number. He has to check the length of the given string and append it to the end in such a way that if the original string ends with a number then the new string with the appended value must have the length of the string as the last two characters. If the string ends with a character then append the total length as the last character. Also, the number to be appended must be a single positive digit. Write a code to implement the given scenario. Input format Input consist of a string Output format The output displays the single-digit value to be appended. If the value is more than one digit or no digit is to be appended, then print − 1. Robert is given a string that ends with a character or a number. He has to check the length of the given string and append it to the end in such a way that if the original string ends with a number then the new string with the appe...

• • • ▼Python Exercises • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • ▼Python GUI tkinter • • • ▼Python NumPy • • ▼Python GeoPy • • ▼BeautifulSoup • • ▼Arrow Module • • ▼Python Pandas • • ▼Python Machine Learning • • ▼Python Web Scraping • • ▼Python Challenges • • ▼Python Mini Project • • ▼Python Natural Language Toolkit • • ▼Python Project • • Python String [113 exercises with solution] Python has a built-in string class named "str" with many useful features. String literals can be enclosed by either single or double, although single quotes are more commonly used. You may read our [ An editor is available at the bottom of the page to write and execute the scripts. 1. Write a Python program to calculate the length of a string. 2. Write a Python program to count the number of characters (character frequency) in a string. Sample String : google.com' Expected Result : 17. Write a Python function to get a string made of 4 copies of the last two characters of a specified string (length must be at least 2). Sample function and result : insert_end('Python') -> onononon insert_end('Exercises') -> eseseses 18. Write a Python function to get a string made of the first three characters of a specified string. If the length of the string is less than 3, return the original string. Sample function and result : first_three('ipy') -> ipy first_three('python') -> pyt 19. Write a Python program to get the last part of a string before a specified ch...

As you know, the stings are widely used to hold textual data. To perform any programming tasks in Python, a good understanding of string manipulation is necessary. These string exercises will help Python developers to learn and practice string operations, manipulations, slicing, and string functions. Also Read: • This String Exercise includes the following: – • It contains 18 Python string programs, questions, problems, and challenges to practice. • The solution is provided for all questions. • All string programs are tested on Python 3 Use to solve exercise questions. Let us know if you have any alternative solutions in the comment section below. • Use string indexing to get the character present at the given index. • Use str1[0] to get the first character of a string and add it to the result variable • Next, get the middle character’s index by dividing string length by 2. x = len(str1) /2. Use str1[x] to get the middle character and add it to the result variable • Use str1[len(str1)-1] to get the last character of a string and add it to the result variable • print result variable to display new string str1 = 'James' print("Original String is", str1) # Get first character res = str1[0] # Get string size l = len(str1) # Get middle index number mi = int(l / 2) # Get middle character and add it to result res = res + str1[mi] # Get last character and add it to result res = res + str1[l - 1] print("New String:", res) Exercise 1B: Create a string made of the middle three charac...

Input: str = “#GeeksForGeeks123@” Output: Yes Explanation: The given string contains uppercase characters(‘G’, ‘F’), lowercase characters(‘e’, ‘k’, ‘s’, ‘o’, ‘r’), special characters( ‘#’, ‘@’), and numeric values(‘1’, ‘2’, ‘3’). Therefore, the output is Yes. Input: str = “GeeksForGeeks” Output: No Explanation: The given string contains only uppercase characters and lowercase characters. Therefore, the output is No. first, before moving on to the solution. Naive Approach: The simplest approach is to • Traverse the string character by character from start to end. • Check the ASCII value of each character for the following conditions: • If the ASCII value lies in the range of [65, 90], then it is an uppercase letter. • If the ASCII value lies in the range of [97, 122], then it is a lowercase letter. • If the ASCII value lies in the range of [48, 57], then it is a number. • If the ASCII value lies in the ranges [32, 47], [58, 64], [91, 96] or [123, 126], then it is a special character • Print Yes if the string contains all the above. Otherwise, print No. Time Complexity: O(N) Auxiliary Space: O(1) Regular Expression Approach: The idea is to the concept of a • Create a regex = “^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d)” + “(?=.*[-+_!@#$%^&*., ?]).+$” where, • ^ represents the starting of the string. • (?=.*[a-z]) represent at least one lowercase character. • (?=.*[A-Z]) represents at least one uppercase character. • (?=.*\\d) represents at least one numeric value. • (?=.*[-+_!@#$%^&*....

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As you know, the stings are widely used to hold textual data. To perform any programming tasks in Python, a good understanding of string manipulation is necessary. These string exercises will help Python developers to learn and practice string operations, manipulations, slicing, and string functions. Also Read: • This String Exercise includes the following: – • It contains 18 Python string programs, questions, problems, and challenges to practice. • The solution is provided for all questions. • All string programs are tested on Python 3 Use to solve exercise questions. Let us know if you have any alternative solutions in the comment section below. • Use string indexing to get the character present at the given index. • Use str1[0] to get the first character of a string and add it to the result variable • Next, get the middle character’s index by dividing string length by 2. x = len(str1) /2. Use str1[x] to get the middle character and add it to the result variable • Use str1[len(str1)-1] to get the last character of a string and add it to the result variable • print result variable to display new string str1 = 'James' print("Original String is", str1) # Get first character res = str1[0] # Get string size l = len(str1) # Get middle index number mi = int(l / 2) # Get middle character and add it to result res = res + str1[mi] # Get last character and add it to result res = res + str1[l - 1] print("New String:", res) Exercise 1B: Create a string made of the middle three charac...

myStr="" In python, every string starts with and ends with quotation marks i.e. single quotes ‘‘, double quotes ”” or triple quotes “””“””. String Manipulation in Python String manipulation in python is the act of modifying a string or creating a new string by making changes to existing strings. To manipulate strings, we can use some of Pythons built-in methods. Create a String in Python To create a string with given characters, you can assign the characters to a variable after enclosing them in double quotes or single quotes as shown below. word = "Hello World" print(word) Output: Hello World In the above example, we created a variable word and assigned the string "Hello World" to the variable. You can observe that the string is printed without the quotation marks when we print it using the print() function. Access Characters in a String in Python To access characters of a string, we can use the [ ] i.e. square brackets to access characters in a string as shown below. word = "Hello World" print("The word is:",word) letter=word[0] print("The letter is:",letter) Output: The word is: Hello World The letter is: H In the above example, we created a string “Hello World” and assigned it to the variable word. Then, we used the letter. Find Length of a String in Python To find the length of a string in Python, we can use the len() function. The len() function takes a string as input argument and returns the length of the string as shown below. word = "Hello World" print("The strin...

• • • ▼Python Exercises • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • ▼Python GUI tkinter • • • ▼Python NumPy • • ▼Python GeoPy • • ▼BeautifulSoup • • ▼Arrow Module • • ▼Python Pandas • • ▼Python Machine Learning • • ▼Python Web Scraping • • ▼Python Challenges • • ▼Python Mini Project • • ▼Python Natural Language Toolkit • • ▼Python Project • • Python String [113 exercises with solution] Python has a built-in string class named "str" with many useful features. String literals can be enclosed by either single or double, although single quotes are more commonly used. You may read our [ An editor is available at the bottom of the page to write and execute the scripts. 1. Write a Python program to calculate the length of a string. 2. Write a Python program to count the number of characters (character frequency) in a string. Sample String : google.com' Expected Result : 17. Write a Python function to get a string made of 4 copies of the last two characters of a specified string (length must be at least 2). Sample function and result : insert_end('Python') -> onononon insert_end('Exercises') -> eseseses 18. Write a Python function to get a string made of the first three characters of a specified string. If the length of the string is less than 3, return the original string. Sample function and result : first_three('ipy') -> ipy first_three('python') -> pyt 19. Write a Python program to get the last part of a string before a specified ch...