#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
char st[100];
clrscr();
printf("Enter line of text : ");
gets(st);
strlwr(st);
printf("\nIn lower case : %s",st);
getch();
}
///////////////////////////////////////////////////////////////////////////
Copy & paste this code in your TC & run, then you will get output.......
If you have any problem please comment below.........