Question

Hello! I need help with programming. I'm supposed to create a program that will ask you for a year and a month (year: 2011, Month: 1 for January, 2 for February, etc) and it will tell you how many days are in that month (including leapyears). This is what i have so far:

Answer 1

import java.util.Scanner;

public class Welcome
{
public static void main(String args[])
{
Scanner input = new Scanner(System.in);
System.out.print("Enter a year:");
int year = input.nextInt();

System.out.print("Enter a month:");
int month = input.nextInt();
int days = 0;
boolean isLeapYear = (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);

switch (month)
{
case 1: days = 31;
break;
case 2: if (isLeapYear)
days = 29;
else
days = 28;
break;
case 3: days = 31;
break;
case 4: days = 30;
break;
case 5: days = 31;
break;
case 6: days = 30;
break;
case 7: days = 31;
break;
case 8: days = 31;
break;
case 9: days = 30;
break;
case 10: days = 31;
break;
case 11: days = 30;
break;
case 12: days = 31;
break;
}
}
}

Answer 2

whats the problem?

Answer 3

The switch statement might require a default? I'll test it.

Answer 4

When I try to run the program, it wont tell me the days. It'll ask for the year, and then the month, but then the program terminates. I also need a failure message, so if you type '99' for the year it'll tell you that its 99 is not a year.

Answer 5

nvm switch doesn't require a default.

Answer 6

The variable days is indeed being set to a value when you run it- however, you never display it's value.

Answer 7

well thats a bit more advanced than what you are doing

Answer 8

woodrow will help you

Answer 9

Never displayed its value? Hmm I thought the case _ : days = __ was its value?

Answer 10

Obviously I'm wrong then.. I'm very lost.. Java programming turned out to be a lot harder then I had initially assumed

Answer 11

You're statement is actually correct.. think of java programming (I believe most languages to be the same way) are read in a top-down format.

So after the user inputs a year and month -- the int value days is assigned the proper value.

However, just because days holds a value, doesn't mean that it is displayed.

To display any variable in java -- you use this magic line of code:
```
System.out.println("this is what the program will print. Hello from java");
```

If you are displaying a variable like 'days', then you simply put it in the parenthesis without using quotes- like so--
```
System.out.println(days);
```

Though if you want text to be displayed, then you use quotations like so:
```
System.out.println("Hello world");
```

If you want it to print a combination of text and variables, you use the + symbol to combine them like so:
```
System.out.println("There are " + days + " days in the month " + month + ".");

```

Answer 12

Alright thank you!

Answer 13

No problem :). If you know where to get this type of information, java syntax isn't too hard to learn.

Answer 14

Textbooks are probably one of the better resources -- like one giant tutorial.

Answer 15

Thank you again!

Answer 16

yw