C library functions - tolower ()
C standard library - <ctype.h>
description
C library functionsint tolower (int c) the given letters to lowercase letters.
statement
Here is () statement tolower function.
int tolower(int c);
parameter
- c - which it is to be converted to lowercase letters.
return value
C If there is the corresponding lowercase letters, then the function returns a lowercase c, c otherwise remains unchanged. The return value is a formula that can be implicitly converted to int type char.
Examples
The following example demonstrates tolower () function is used.
#include <stdio.h>
#include <ctype.h>
int main()
{
int i = 0;
char c;
char str[] = "W3CSCHOOL TUTORIALS";
while( str[i] )
{
putchar(tolower(str[i]));
i++;
}
return(0);
}
Let's compile and run the above program, which will result in the following:
w3cschool tutorials