manish sharma

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manish sharma

islower is a function in C (part of <ctype.h>) that checks if a given character is a lowercase letter (a-z). It returns a nonzero value if the character is lowercase and zero otherwise. This function is commonly used in text processing, case conversion, and validation.

Example usage:

c
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#include <stdio.h>
#include <ctype.h>

int main() {
char ch = 'g';
if (islower(ch)) {
printf("The character is lowercase.
")