String programming exercises and solutions in C

Strings are basically array of characters that represent some textual data in a program. Here are basic string programs with detailed explanation that will help to enhance your string programming skills. These exercises can be practiced by anyone a beginner or an intermediate programmers.

1. Write a C program to find length of a string.
2. Write a C program to copy one string to another string.
3. Write a C program to concatenate two strings.
4. Write a C program to compare two strings.


5. Write a C program to convert lowercase string to uppercase.
6. Write a C program to convert uppercase string to lowercase.
7. Write a C program to toggle case of each character of a string.


8. Write a C program to find total number of alphabets, digits or special character in a string.
9. Write a C program to count total number of vowels and consonants in a string.
10. Write a C program to count total number of words in a string.
11. Write a C program to find reverse of a string.
12. Write a C program to check whether a string is palindrome or not.
13. Write a C program to reverse order of words in a given string.


14. Write a C program to find first occurrence of a character in a given string.
15. Write a C program to find last occurrence of a character in a given string.
16. Write a C program to search all occurrences of a character in given string.
17. Write a C program to count occurrences of a character in given string.
18. Write a C program to find highest frequency character in a string.
19. Write a C program to find lowest frequency character in a string.
20. Write a C program to count frequency of each character in a string.
21. Write a C program to remove first occurrence of a character from string.
22. Write a C program to remove last occurrence of a character from string.
23. Write a C program to remove all occurrences of a character from string.
24. Write a C program to remove all repeated characters from a given string.
25. Write a C program to replace first occurrence of a character with another in a string.
26. Write a C program to replace last occurrence of a character with another in a string.
27. Write a C program to replace all occurrences of a character with another in a string.


28. Write a C program to find first occurrence of a word in a given string.
29. Write a C program to find last occurrence of a word in a given string.
30. Write a C program to search all occurrences of a word in given string.
31. Write a C program to count occurrences of a word in a given string.
32. Write a C program to remove first occurrence of a word from string.
33. Write a C program to remove last occurrence of a word in given string.
34. Write a C program to remove all occurrence of a word in given string.


35. Write a C program to trim leading white space characters in a string.
36. Write a C program to trim trailing white space characters in a string.
37. Write a C program to trim both leading and trailing white space characters in a string.
38. Write a C program to remove all extra blank spaces from a given string.