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Write a program to swap values of two variables with and without using third variable.
Asked by Roquaiyya Rashid Last Modified
Answer 
I assume you know Python 3, so I'll answer using that, similar can be done in other languages.
1) #suppose you want to switch values of a and b
temp = a #we create a temp variable which will store the value of a
a = b; b = temp
#Now, if we hadn't created temp variable then b would take the value of a but mind that a has a value of b, so b will take the value of a which is not what you want.
2) There is another way and that is using tuples it's most easy you
don't need to make any 3rd variable. it's simply:
a,b = b, a #you can add parenthesis if you want. that's it you've swapped the values.
With third variable
Swap(a,b):
c=a
a=b
b=c
Without third variable
Swap(a,b):
a = a+b
b= a-b
a= a-b
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Geeta Kulkarni
Programming is an creative Art . I help students to be creative artist by learning coding skill.
Before swap a=10 b=20After swap a=20 b=10
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