C does not have built-in exception handling like some higher-level languages.
Instead, it uses error codes or return values to indicate if an error occurred

In C, error handling is typically done by returning error codes or values from 
functions. This is in contrast to languages with built-in exception handling,
where exceptions are used to indicate and handle errors.

When a function encounters an error, it can return a specific value or code
indicating that an error occurred. The calling function can then check the return
value to determine if an error occurred and take appropriate action.

For example, the following function might return -1 if an error occurs:

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int divide(int a, int b) {
    if (b == 0) {
        return -1; 
    }
    return a / b;
}

Then the calling function will check the return value, like this:

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int result = divide(10, 2);
if (result == -1) {
    printf("Error: division by zero!");
} else {
    printf("Result: %d", result);
}

Another way of indicating error is by using global variables or output parameters.
These are commonly used to return multiple values from a function, including an 
error code.

This approach is less flexible and less robust than exception handling, as it
requires the programmer to explicitly check for error codes or values at every 
point where a function that can fail is called. It also makes it harder to separate
error handling code from the rest of the program, which can lead to more complex
and harder-to-maintain code.