islower function >> ctype.h >> header files in c Programming

---

Syntax	int islower (int c)
Header File	ctype.h
Return Value	Return non-zero if c is  Lowercase Letter Return zero if c is not Lowercase Letter

---

Live Example :

void main()
{
char ch = 'a';
if( islower(ch))
       printf("\nThis is Lowercase Character");
else
       printf("\nThis is not an Lowercase Character");
}

---

Output : 

This is Lowercase Character

---

Explanation of statement : if(islower(ch))

1. character ch is passed to function islower
2. if ch belongs to the set of Lowercase Characters [a-z] then it returns non-zero value 
3. otherwise it returns zero .

Note : 

1. Positive non-zero value given to if block , will result in TRUE condition
2. Zero value given to if block , will result in FALSE condition

---

Bookmark & Share