| 1 | Check if a given string is palindrome or not |  Solution | |
| 2 | Count number of vowels, consonants, spaces in String | Solution | |
| 3 | Find the ASCII value of a character | Solution | |
| 4 | Remove all vowels from the string | Solution | |
| 5 | Remove spaces from a string | Solution | |
| 6 | Remove characters from a string except alphabets | Solution | |
| 7 | Reverse a String | Solution | |
| 8 | Remove brackets from an algebraic expression | Solution | |
| 9 | Sum of the numbers in a String | Solution | |
| 10 | Capitalize first and last character of each word | Solution | |
| 11 | Calculate frequency of characters in a string | Solution | |
| 12 | Find Non-repeating characters of a String | Solution | |
| 13 | Check if two strings are anagram of each other | Solution | |
| 14 | Count common sub-sequence in two strings [DP] | Solution | |
| 15 | Check if two strings match where one string contains wildcard characters [DP] | Solution | |
| 16 | Return maximum occurring character in the input string | Solution | |
| 17 | Remove all duplicates from the input string | Solution | |
| 18 | Print all the duplicates in the input string | Solution | |
| 19 | Remove characters from first string present in the second string | Solution | |
| 20 | Change every letter with the next lexicographic alphabet in the given string | Solution | |
| 21 | Write a program to find the largest word in a given string | Solution | |
| 22 | Write a program to sort characters in a string | Solution | |
| 23 | Count number of words in a given string | Solution | |
| 24 | Write a program to find a word in a given string with the highest number of repeated letters | Solution | |
| 25 | Change case of each character in a string | Solution | |
| 26 | Concatenate one string to another | Solution | |
| 27 | Write a program to find a substring within a string. If found, display its starting position | Solution | |
| 28 | Reverse words in a string | Solution | |