C Program to Check Whether Character is Lowercase or Not without using Library Function

#include<stdio.h>
void main()
{
char ch;
int i;
clrscr();
printf("\nEnter The Character : ");
scanf("%c",&ch);

if(ch>='a' &&ch<='z')
  printf("\nCharacter is Lowercase Letters");
else
  printf("\nCharacter is Not Lowercase Letters");

getch();
}

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Way 2 :

#include<stdio.h>
void main()
{
char ch;
int i;
clrscr();
printf("\nEnter The Character : ");
scanf("%c",&ch);

if(ch>=97 && ch<=122)
  printf("\nCharacter is Lowercase Letters");
else
  printf("\nCharacter is Not Lowercase Letters");

getch();
}

---

Output :

Enter The Character : a
Character is Lowercase Letters