SQLite - Testing for existence of a table

I am learning how to access SQLite without the use of Swift Data. I have a function that tests to see if a table exists and it works. The problem is that I do not understand why it works. It is my understanding that the SELECT statement returns a 0 if the table does not exist and 1 if it does. But the API step statement returns 101 (SQLITE_Done) if the table does not exist. But if the table does exist it does not return 101. Per the SQLite documentation it would appear that 101 means the operation has completed. What am I missing here and is there a way to capture the underlying SQLite 0 or 1 which would allow me to test for that? Below is my function.

func doesTableExist(db: OpaquePointer?) -> Bool {
    
    var tableExists: Bool = true
    
    let testForTable = """
    SELECT name FROM sqlite_master
    WHERE type='table'
    AND name='Contact';
    """
    
    var testForTablePtr: OpaquePointer?
    
    if sqlite3_prepare_v2(db, testForTable, -1, &testForTablePtr, nil) == SQLITE_OK {
        if sqlite3_step(testForTablePtr) == SQLITE_DONE {
            tableExists = false
        }
    } else {
        print("unable to compile sql statement testing to see if table exists")
    }
    return tableExists
}