What is the process for utilizing the ctype.h library within a conditional statement?

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The process for utilizing the ctype.h library within a conditional statement involves the following steps:

1. Include the ctype.h library at the beginning of the program with #include <ctype.h>.

2. Declare the variable that you want to check for the conditions.

3. Use the relevant functions provided in ctype.h like isalpha(),isdigit(), isspace() etc., to check for the required condition.

4. Place the function within the conditional statement, specifying the variable you want to check.

Here is an example code to demonstrate the process with a conditional statement that checks if the user input is a digit:

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

int main() {
    char user_input;

    printf("Enter a character: ");
    scanf("%c", &user_input);

    if (isdigit(user_input)) {
        printf("%c is a digit.\n", user_input);
    } else {
        printf("%c is not a digit.\n", user_input);
    }

    return 0;
}

In this example, we declared the variable "user_input", which will hold the user's input. We then used the "isdigit()" function provided by the ctype.h library in the conditional statement to check if the input is a digit. If the input is a digit, the program will print "%c is a digit." If not, it will print "%c is not a digit."