Java Programming - Flow Control - Discussion
Discussion Forum : Flow Control - Finding the output (Q.No. 7)
7.
What will be the output of the program?
public class If1
{
static boolean b;
public static void main(String [] args)
{
short hand = 42;
if ( hand < 50 && !b ) /* Line 7 */
hand++;
if ( hand > 50 ); /* Line 9 */
else if ( hand > 40 )
{
hand += 7;
hand++;
}
else
--hand;
System.out.println(hand);
}
}
Answer: Option
Explanation:
In Java, boolean instance variables are initialized to false, so the if test on line 7 is true and hand is incremented. Line 9 is legal syntax, a do nothing statement. The else-if is true so hand has 7 added to it and is then incremented.
Discussion:
13 comments Page 1 of 2.
Ruhan said:
4 years ago
@All.
I think the line 9 condition is not satisfied. Am I right?
I think the line 9 condition is not satisfied. Am I right?
Ruhan said:
4 years ago
If (hand > 50); this is legal and we won't get any error but as the condition is true and we entered in this statement then why we are going for else if condition, as our first statement is satisfied program, should be executed there itself and answer is 43.
Shrey jain said:
8 years ago
Boolean b how can you say Boolean variable b is ture?
And condition work.
I think the answer should we 41.
And condition work.
I think the answer should we 41.
Srinivas said:
9 years ago
!b true because in place of
if (42>50&&!b) return true.
It means !b before ! default is False that's why that is true?
if (42>50&&!b) return true.
It means !b before ! default is False that's why that is true?
Ranga said:
1 decade ago
What is the correct answer?
Bhosale suman said:
1 decade ago
!b return true.
50&&!b return 1 = true.
If (42> 50&&!b) return false.
How line 7 can be true?
50&&!b return 1 = true.
If (42> 50&&!b) return false.
How line 7 can be true?
Kaushik Mitra said:
1 decade ago
@Sravan, it is because flow goes to 'else if' part if the condition in 'if' statement is not satisfied.
Sravan said:
1 decade ago
In line 9 as it is a legal statement why it would go for else if?
Cloud Nine said:
1 decade ago
@Sonu, That is the unary AND(^) operator.
A B (A^B)
0 0 0
0 1 0
1 0 0
1 1 1
Where, 0=false, 1=true.
A B (A^B)
0 0 0
0 1 0
1 0 0
1 1 1
Where, 0=false, 1=true.
Sonam said:
1 decade ago
The 'if' statement on line 7 will return true hence hand will be incremented by 1,so its value will be 43.Then,if statement on line 9 won't be executed because that condition will be false so 'else if' will execute so value of hand will be 43+7+1=51.
So,answer will be 51.
So,answer will be 51.
(1)
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