system.out.println()

[hoggy]

hello
i am just a beginner of java but iwant know if i can declare a variable of any datatype and output its value simaltaneously using sytem.out.println()
if no ihave another doubt
how this is possible
for(int i=0;i<10;i++);
please tell me
hanks in advance

[Laharl]

Assuming you're working with primitives (int, double, boolean, etc), this is as simple as putting the value in System.out.println().

System.out.println(4); //Should print 4
 

For objects, if the toString() is defined, you can call an unnamed constructor in System.out.println() and print that way.

System.out.println(new Integer(4)); //Prints 4
 

As to your loop question, that works because the for loop is a builtin Java construct that works with that syntax. I'm not sure how else to explain this to you...

[hoggy]

thanks
but
can i write
system.out.println(int num=10 +num)?
num is not declared anywhere before this statement in the program

[BigDaddyLH]

hello
i am just a beginner of Java but i want know if i can declare a variable of any datatype and output its value using Sytem.out.println()

Tip: bookmark the API and learn to look things up there: http://java.sun.com/javase/6/docs/api/

Using it you would see that System.out is of type System.out.PrintStream
And that println is overridden to take a boolean, car, char[], double, float, int, long, String or Object. So pass it anything, but realize that if you are using the Object version and passing it a non-null reference, it will use the object toString method, which may or may not be what you want.

More generally, why not just try it and see what happens? It's faster that posting a question in the forum.

how this is possible
for(int i=0;i<10;i++);
please tell me
hanks in advance

I don't understand your question. Are you asking why that is legal syntax? It's beacuse of the empty statement.

[BigDaddyLH]

thanks
but
can i write
system.out.println(int num=10 +num)?

The best way to find out is to try it and see.

[hoggy]

have u tried the print statement before if not please try it and tell me please dont mind
and about the loop statement
if i write
for(int i=0;i<10;i++)
{
sytem.out.println("i is" +i);
}
it is possible in c++ bcoz there is no restriction that variables must be daeclared all at once it follows bottom to top approach then my line
system.out.println must be right please tellme
.good night

[BigDaddyLH]

have u tried the print statement before if not please try it and tell me please dont mind
and about the loop statement
if i write
for(int i=0;i<10;i++)
{
sytem.out.println("i is" +i);
}
it is possible in c++ bcoz there is no restriction that variables must be daeclared all at once it follows bottom to top approach then my line
system.out.println must be right please tellme
.good night

Don't post "can I do this" posts. Just try it and see. If you don't have access to a compiler at the moment, then wait until you can compile it.