Android Development for Beginners : Calculate the Price Method

Option A

/**
 * Calculates the price of the order based on the current quantity.
 *
 * @return the price
 */
private int calculate price(int quantity {
    int price = quantity * 5;
    return price;
}

Option B

/**
 * Calculates the price of the order based on the current quantity.
 *
 * @return the price
 */
private calculatePrice(int quantity)
    int price = quantity * 5;
    return price;

Option C

/**
 * Calculates the price of the order based on the current quantity.
 *
 * @return the price
 */
private int calculatePrice(int quantity) {
    int price = quantity * 5;
    return price;
}

android app development declaration method