swap 2 variables without using 3 rd variable???

Categories >> Software >> Testing >> Manual Testing
Suggest New Category

Question Posted / guest

10 Answers
14039 Views
Philips, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

swap 2 variables without using 3 rd variable???..

Answer / rajendra

let
A=10
B=20
after swaping A=20
B=10
ok
A = A + B (A = 20+10 = 30)
B = A - B (B = 20-10 = 10)---->B=10
A = A - B (A = 30-10 = 20)---->A=20
Thats all very simple

byee Friends
rajendra
rajendra prasad reddy
rajendra_penumalli@yahoo.com
9885162742
hyd

Is This Answer Correct ?

9 Yes

3 No

swap 2 variables without using 3 rd variable???..

Answer / david

a^=b
b^=a
a^=b

Is This Answer Correct ?

1 Yes

1 No

swap 2 variables without using 3 rd variable???..

Answer / guest

Ex:
1.
A=20,B=10
A=A-B=20-10=10
B=A+B=10+10=20
A=B-A=20-10=10

2.
A=6,B=4
A=A-B=6-4=2
B=A+B=2+4=6
A=B-A=6-2=4

The above logic works if A>B. If B>A:

B=6, A=4
B=B-A=6-4=2
A=A+B=4+2=6
B=A-B=6-2=4

Is This Answer Correct ?

0 Yes

0 No

swap 2 variables without using 3 rd variable???..

Answer / padma

Manual testing can be carried out using data validation and
data verification techniques as the function or piece of
code is entirely based on the variables.

Is This Answer Correct ?

0 Yes

0 No

swap 2 variables without using 3 rd variable???..

Answer / padmas

In The Manual Testing process, The team/member is not allowed to do any kind of code/unit or piece of code modifications. etc...,even though the members are aware of bug/ defect exists in the unit/code. Because the question falls under manual testing and even though I know how to do it, it is not out of the box question.

Is This Answer Correct ?

0 Yes

0 No

swap 2 variables without using 3 rd variable???..

Answer / gm

Before Swaping
A = 10
B = 20
After Swapping
A = 20
B = 10

Solution:
B = B - A =(20-10) = 10 ---> B = 10
A = A + B =(10+10) = 20 ---> A = 20 (since B = 10 now)

Is This Answer Correct ?

2 Yes

3 No

swap 2 variables without using 3 rd variable???..

Answer / viji

you can go swap function
swap(a,b)

Is This Answer Correct ?

0 Yes

1 No

swap 2 variables without using 3 rd variable???..

Answer / naresh

rajendra is correct

but the example he took is wrong...

Is This Answer Correct ?

0 Yes

2 No

swap 2 variables without using 3 rd variable???..

Answer / hari

sorry your question is wrong

Is This Answer Correct ?

0 Yes

3 No

swap 2 variables without using 3 rd variable???..

Answer / manu

sorry rejendra but i think u r wrong
u hae initially takn a=10 and b=20
ut had taken opposite values moreovr when u have performed
the operation a=a+b
now the value of a has become 30 not the previous 1
i think this will be done with the use of temp variable

Is This Answer Correct ?

1 Yes

5 No

Post New Answer