C library functions - toupper ()
C standard library - <ctype.h>
description
C library functionsint toupper (int c) of the lowercase letters converted to uppercase letters.
statement
Here is () statement toupper function.
int toupper(int c);
parameter
- c - which is to be converted to uppercase letters.
return value
C If there is corresponding capital letters, then the function returns c capital letters, otherwise c remains unchanged. The return value is a formula that can be implicitly converted to int type char.
Examples
The following example demonstrates toupper () function is used.
#include <stdio.h>
#include <ctype.h>
int main()
{
int i = 0;
char c;
char str[] = "W3Cschool Tutorials";
while(str[i])
{
putchar (toupper(str[i]));
i++;
}
return(0);
}
Let's compile and run the above program, which will result in the following:
W3CSCHOOL TUTORIALS