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                # Java 程序:相加兩個數字 > 原文: [https://beginnersbook.com/2017/09/java-program-to-add-two-numbers/](https://beginnersbook.com/2017/09/java-program-to-add-two-numbers/) 在這里我們將看到兩個程序相加兩個數字。在第一個程序中,我們指定程序本身中兩個數字的值。第二個程序獲取兩個數字(由用戶輸入)并打印總和。 ## 第一個例子:兩個數字的總和 ```java public class AddTwoNumbers { public static void main(String[] args) { int num1 = 5, num2 = 15, sum; sum = num1 + num2; System.out.println("Sum of these numbers: "+sum); } } ``` 輸出: ```java Sum of these numbers: 20 ``` ## 第二個示例:使用`Scanner`的兩個數字的總和 掃描儀允許我們捕獲用戶輸入,以便我們可以從用戶獲取這兩個數字的值。然后程序計算總和并顯示它。 ```java import java.util.Scanner; public class AddTwoNumbers2 { public static void main(String[] args) { int num1, num2, sum; Scanner sc = new Scanner(System.in); System.out.println("Enter First Number: "); num1 = sc.nextInt(); System.out.println("Enter Second Number: "); num2 = sc.nextInt(); sc.close(); sum = num1 + num2; System.out.println("Sum of these numbers: "+sum); } } 輸出: ``` ```java Enter First Number: 121 Enter Second Number: 19 Sum of these numbers: 140 ```
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