doubt

[sunny]

boolean flag=false;
if(flag=true)
{
System.out.println("true");
}
else
{
System.out.println("false");
}
The key answer is true.But I think answer is false.
Why is it so?Please clarify.Thanks in advance

[Savithri Devaraj]

Originally posted by sunny:
boolean flag=false;
if(flag=true)
{
System.out.println("true");
}
else
{
System.out.println("false");
}
The key answer is true.But I think answer is false.
Why is it so?Please clarify.Thanks in advance

Change Line 2 to ==, otherwise you are assigning true to flag, hence the result.
Savithri

[Ankur Gupta]

Sunny,
The condition in an if statement should evaluate to be boolean. The statement "if (flag=true)..." is an assignment for flag but it results in a boolean value for the if statement. Therefore the answer is given as true.
Ankur

[sunny]

Hi savithri,
I amde a mistake.
ok.If we give as
if(flag==true)
How the answer is true.I think it should be false because flag is assigned to false.

[Savithri Devaraj]

Originally posted by sunny:
Hi savithri,
I amde a mistake.
ok.If we give as
if(flag==true)
How the answer is true.I think it should be false because flag is assigned to false.

This code here
class abc{
public static void main(String args[]){

boolean flag=false;
if(flag==true)
{
System.out.println("true");
}
else
{
System.out.println("false");
}
}
}
will printout false, it will not print true.
== tests for a value, = assigns a value. Assignment statements return the value assigned.
Hope this clarifies your doubt.
Savithri

[sunny]

Thank u. This clarifies my doubt.