I have one question,in the basic concepts of java its written that int can hold whole numbers,string can hold names,then why

Question

int=day is true in switch case

Answer 1

When you do switch(day), the integer stored inside day is evaluated under case. If case wherein day is 1 is fulfilled, the string is printed. It is the same as :

if (day == 1)
{
System.out.println("Monday")
}
else
if (day == 2)
{
// ...
}

This does not mean that the string value is stored inside day.

Answer 2

String, int, are datatypes (keywords).

2, 18381, -173 are values which can be stored in int variables.
"Hi", "Test", "This is a string", "20", "394" are values which can be stored in String variables.

E.g. int some_num = 3939;

// store 3939 into integer variable some_num

E.g. String some_str = "Hello";

// store "Hello" into String variable some_str

Answer 3

So this code isn't saying "int = day" this is evaluating what day is equal to, then running some statements depending on the value of day. That's why day is in the switch.
switch(day){}
// we are testing the value of day

case 3:
Means, do this if whatever was in the switch is equal to 3.
So, if (day == 3)
Then do that.

Answer 4

day would just be a variable of type int.
It's not actually saying: is the int equal to "day".

Answer 5

No, var is not a keyword in java.

Answer 6

Guessing won't really get things working.

Can you show the code that made "int = day" give you true?

Answer 7

Here's an example to follow if you need to

https://code.sololearn.com/cG3t2bOHihjg/?ref=app

Answer 8

You can do String = Day but that means you'll need to add a more structured input that will remove as much human error as possible.

Answer 9

I think you should show the code in its entirety. This way you may get a better explanation.

Answer 10

You're comparing int to int and outputting a String. This is correct.

Answer 11

oh,means it saying that int=3

Answer 12

from what I know, int is a data type, it's a reserve word, you can't use it to hold values. it's use to identify what kind of data can a variable hold..

comparing values should be "==" not "=". single equal sign is used for assignment.. please try to be clear... thanks

and, can we see the structure of your switch case? thanks

Answer 13

if what you mean about the "int = day" is that "day" is declared as String then you use it on switch case using numbers like case 1 case 2 and so on.. I guess we have to remember that numbers can be a String, there's no problem comparing it on switch case. The problem I guess takes place when day is declared as String and you use it on mathematical operations. But you can still do mathematical operations on variables such as "day" declared as String, by casting it's value to int..
do like this, (int) day.
🏃🏃🏃

Answer 14

if i write var instead of int is it correct

Answer 15

im not understanding,plz tell me all these things briefly and in long

Answer 16

if we write string instead of int is it correct

Answer 17

public class Program {
public static void main(String[] args) {
int day = 3;
switch(day) {
case 1:
System.out.println("Monday");
break;
case 2:
System.out.println("Tuesday");
break;
case 3:
System.out.println("Wednesday");
break;
}
}
}

Answer 18

why int=day

Answer 19

why string =day not