c check if character is lower case

Checking if a Character is Lower Case in C

To check if a character is lowercase in C, you can use the islower() function from the ctype.h library. This function takes an integer representing a character as an argument and returns a non-zero value if the character is a lowercase letter.

Here's an example of how you can use the islower() function in C:

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

int main() {
    char ch = 'a';

    if (islower(ch)) {
        printf("%c is a lowercase letter\n", ch);
    } else {
        printf("%c is not a lowercase letter\n", ch);
    }

    return 0;
}

In this example, the islower() function is used to check if the character 'a' is a lowercase letter. If it is, the program will print that 'a' is a lowercase letter.

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