我如何打印年齡乘以3

Question

我希望年齡乘以3這裏是我的代碼要求用戶輸入姓名和年齡............... ................................

import java.util.Scanner; 

class Lab1Part4 { 

public static void main (String [] args) { 

Scanner user_input = 
    int tripleAge; 
    String printMyName; 
    String firstName; 
    String secondName; 

    System.out.println("Please enter your first name ? "); 
    firstName = user_input.next(); 

    System.out.println("Please enter your second name? "); 
    secondName = user_input.next(); 

    printMyName = firstName + " " + secondName; 

    System.out.println(printMyName); 

    System.out.println("Enter your age ? "); 
    tripleAge = user_input.nextInt(); 







}// end class 

} //結束主

Answer 1

你只需要做的是這樣的：

tripleAge = user_input.nextInt() * 3; 
System.out.println(tripleAge); 

Answer 2

使用*操作繁殖。

tripleAge = (user_input.nextInt() * 3); 
System.out.println(tripleAge);