Why do we add the " I " at the end of this array int[] v=new int[2], I;

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1.00/5 (1 vote)

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i found this code that confused me thought something was wrong with the writing of the array but tried it in java and worked

What I have tried:

tried searching the code int[] v=new int[N],i; but found nothing

Posted 18-Oct-21 18:35pm

SilentH11

Updated 18-Oct-21 20:08pm

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2 solutions

Solution 2

You don't have to: the comma allows you to declare a second or third variable of the same type if you wish:

Java

int[] v=new int[N],i;
...
String name = v.getClass().getSimpleName();
System.out.println(name);
name = i.getClass().getSimpleName();
System.out.println(name);

Will tell you that both v and i are declared as int[]

Posted 18-Oct-21 20:08pm

OriginalGriff

v2

Comments

CPallini 19-Oct-21 2:22am

+5.
Nice.

Maciej Los 19-Oct-21 2:33am

Also 5!

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CPallini · Accepted Answer · 2021-10-18T20:01:00

Solution 1

The comma (',') is a separator in Java. hence the line

Java

int [] v = new int[2], i;

declares and initializes v as an array of int and declares i as an array of int as well (note i is left uninitialized).

Try

Java

public class Foo
{ 
  public static void main( String args[] )
  {
    int [] v = new int[2], i;

    i = new int[3];

    v[1] = 7;
    i[2] = 42;

    System.out.println(v[1]);
    System.out.println(i[2]);
  }
}

Posted 18-Oct-21 20:01pm

CPallini

Comments

Maciej Los 19-Oct-21 2:07am

5ed!

CPallini 19-Oct-21 2:20am

Thank you, Maciej!

SilentH11 19-Oct-21 2:27am

thanks for the help!!🤗

CPallini 19-Oct-21 2:34am

You are welcome.