C String uppercase

In this section, you will learn how to convert a string value in to uppercase. In the given example, we have define a string in lowercase characters.

C String uppercase

C String uppercase

     

In this section, you will learn how to convert a string value in to uppercase. In the given example, we have define a string in lowercase characters. Therefore, in order to convert the characters of string in uppercase (A to Z), we have used the library function toupper() provided by the header file <ctype.h>.

<ctype.h> - This header file is used for testing and converting characters. 

Here is the code:

 

 

 

STRINGUP.C

#include <ctype.h>
#include <stdio.h>
#include <conio.h>

int main(void) {
  char st[40]="hello world";
  int i;
  for (i = 0; st[i]; i++)
  st[i] = toupper(st[i]);
  printf("The uppercase of String= %s\n", st);
  getch();
  return 0;
}

Output will be displayed as:

STRINGUP.EXE

Download Source Code:

Tutorials

  1. C Tutorials
  2. C Array copy example
  3. C Array Declaration
  4. C Array default values
  5. C Array length example
  6. C array of pointers
  7. C array sort example
  8. C String length
  9. C Break with Switch statement
  10. C Break for loop
  11. C break continue example
  12. Array of String using Pointers
  13. C Array of String
  14. C String to Int
  15. C define Macro
  16. C Current Time
  17. C String Remove Spaces
  18. C Pointer to a function
  19. C Multiple Indirection
  20. C Goto Statement
  21. C GMT Time
  22. C file write example
  23. C file rename
  24. C file read example
  25. C file open example
  26. C file Last Modified Date
  27. C file delete example
  28. C Dynamic Array
  29. C String Copy
  30. C String Concatenation
  31. C String Compare
  32. C Replace String
  33. C String lowercase
  34. C String Join
  35. C get Substring from String
  36. C Temperature Converter
  37. C Structure Pointer
  38. C Structure example
  39. C String uppercase
  40. C String Tokenizer