#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>

int main(void) {
char buffer[100];
char s[]={0};
char ns[]={0};
int l;
int check;
int i;

printf("Enter a string m80\n");      //getting input from user

fgets(buffer, sizeof(buffer),stdin);
sscanf(buffer,"%s",&s);
l=strlen(s);


printf("Your string was %d characters long.\n", l);   // prints the length of the string



for(i=0; i <= l ; i++ )   // if character is s is uppercase, make it lowercase else copy character from string to new string
{
	if ( isupper(s[i]) )
	{
		 ns[i]=tolower(s[i]);
	}
	else
	{
          ns[i]=s[i];
	}
}
check=strcmp(s, ns);       //compares the two strings

if (check==0)
    {
	printf("String is lowercase\n");
	}

else if (check !=0)
    {
	printf("%s \n", ns); //if new string is the same as old, say string is lowercase, else print new string.
	}

}