C islower()
Last Updated :
10 Nov, 2022
islower() function is used to check whether a character is a lowercase letter or not. It is a standard library function defined in the <ctype.h> header file.
Syntax:
int islower(int ch);
Here, ch is the character to be checked.
Return Value:
- If the character is a lowercase letter, the function returns a non-zero value.
- If the character is not a lowercase letter, it returns 0.
Example:
Input: A
The given character is not a lowercase letter
Input: a
The given character is a lowercase letter
Input: 1
The given character is not a lowercase letter
C
#include <ctype.h>
#include <stdio.h>
int main()
{
char ch = 'g' ;
if ( islower (ch) != 0) {
printf (
"The given character is a lowercase letter.\n" );
}
else {
printf ( "The given character is not a lowercase "
"letter.\n" );
}
return 0;
}
|
Output:
The given character is a lowercase letter.
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