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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

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:

� View all related tutorials

Related Tags: c array integer size type int ai max example maximum contains exam e ax pe im in m nt xa

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