C String lowercase

In this section, you will study how to convert the string to lowercase. You can see in the given example, we have define a string in uppercase characters.

C String lowercase

C String lowercase

     

In this section, you will study how to convert the string to lowercase. You can see in the given example, we have define a string in uppercase characters. Therefore, in order to convert the characters in lowercase (a to z), we have used the library function tolower() provided by the header file <ctype.h>.

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

Here is the code:

STRINGLO.C

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

void main() {
  char st[40]="HELLO WORLD";
  int i;
  for (i = 0; st[i]; i++)
  st[i= tolower(st]);
  printf("The lowercase of String= %s\n", st);
  getch();
}

Output will be displayed as:

STRINGLO.EXE

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