Python Strings Practice

Easy

1. Write a program that asks the user to input their name and then prints a welcome message using their name. Example: Welcome, John!
2. Write a Python program that asks the user for their favorite color and prints how many letters the color has. Example: Your favorite color has 4 letters.
3. Write a program that takes a word from the user and prints the first and last letter of the word. Example: For the word "apple," the output should be: First letter: a, Last letter: e
4. Write a program to input a name and then print the number of letters in that name.
5. Write a program to input a word and then print the first 3 and the last 2 characters of that word. In case the word input is less than 3 letters, return the input word itself.
6. Write a program to input a sentence and then print the characters present at the odd index only.
7. Ask the user to enter their favorite fruit, then print the fruit in all uppercase letters. Example: MANGO
8. Write a Python program to ask the user for two words and join them together with a space in between. Example: hello world
9. Ask the user for a word and then print that word repeated 3 times on the same line. Example: If the input is "fun," the output will be: funfunfun
10. Write a program to input a word and then print the the first half of that word.
11. Write a Python program that asks the user to input a word and checks if the letter 'a' is in the word. If it is, print 'a' is in the word!
12. Ask the user to input a word, then print the word backward. Example: For the input "python," the output will be: nohtyp

Moderate

13. 
14. Write a Python function to check if a given string is a palindrome (reads the same forwards and backwards).
    
15. Write a Python program to count how many vowels are present in a given string.
16. Please enter a 10-digit phone number to verify if it's a valid Indian phone number. A valid Indian phone number starts with 6, 7, 8, or 9 and is exactly 10 digits long (e.g., 9876543210, 9123456789 )
17. Write a Python program to find the length of a string without using the built-in len() function.
18. Write a Python function that takes a string as input, removes all spaces from the string, and returns the resulting string.
    
19. Write a program that reads a number from the user and remove all zeroes from it and display the new number.
    
20. Write a Python function to check if a given string contains only digits.
21. Write a Python function to check if a given string contains only digits.(Note: Please dont use any inbuilt String function in this question)
22. Write a program to ask the user for their full name and then print only their initials. Example: For "John Doe," the output should be: J.D.
23. Write a Python program to replace all occurrences of a specific character in a string with another character.
24. Write a Python program to capitalize the first letter of each word in a given string.
25. Write a Python function that concatenates two strings without using the + operator.
26. Write a Python program to check if a string starts with a given substring.
27. Write a Python function that counts the number of uppercase and lowercase characters in a string.
28. Write a Python program to find all occurrences of a substring in a given string.
29. Write a program to accept and change the case of each letter of the string. Display the new string.
    
30. Write a program that accepts a word and checks if it is Palindrome or just a special word.
    Hint A Palindrome is a word which reads that same backwards as forward. For Example: MADAM,MALAYALAM,CIVIC etc .
    Special Words are those which start and end with the same character. For example, COMIC, WINDOW ,etc .
31. Write a Python function that counts the number of words in a given sentence.
    




Advanced

32. Write a program to accept a word and convert into lowercase if it is in uppercase, and display the new word by replacing only the vowels with the character following it.
    
33. 
34. 
35. Write a Python program that takes a phone number as input from the user, masks all digits except the first two and last two, and then prints the masked phone number.
    
36. Write a Python program to input a word and print the new word formed by arranging each letter lexicographically (alphabetical order).
37. Write a Python program to find the character that appears most frequently in a string.
38. Write a Python program to input a sentence from the user and print the first word of that word
    
39. Write a Python function that removes all duplicate characters from a string and returns the result.
40. Write a Python function that takes two strings as input and checks if one string is a substring of the other.
41. Write a Python function to reverse each word in a given sentence, while keeping the words in the same order.
42. Write a Python program to remove all non-alphabetic characters from a string.
43. Write a program that reads several lines of text and prints a table indicating the number of occurrences of each letter of the alphabet in the text.
For example, the phrase To be, or not to be: that is the question: contains one “a,” two “b’s,” no “c’s,” and so on.
44. Write a Python function to split a string by spaces and return a list of words.
45. Write a Python program to input a sentence from the user and print the last word of that word
    
46. Write a Python program to convert a string to a list of characters and print it.
47. Write a program that reads a series of strings and prints only those that end with the letters "ed"
48. Write a program that reads a date in the format 07/21/2003 and prints it in the format July 21, 2003.
Dates are commonly printed in several different formats in business correspondence. Two of the more common formats are 07/21/2003 and July 21, 2003.