def check_params(num_rows, num_cols, padding):
    """Validation and typcasting"""

    num_rows = check_int(num_rows, 'num_rows', min_value=1)
    num_cols = check_int(num_cols, 'num_cols', min_value=1)
    padding = check_int(padding, 'padding', min_value=0)

    return num_rows, num_cols, padding