#17 Python Tutorial for Beginners | Swap 2 Variables in Python

Published: 01 January 1970
on channel: Telusko

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In this lecture we are discussing about different ways to swap two numbers:
-- suppose we have two variables a and b and we want to swap the value of a and b
-- we can do this by directly assigning the value of b to a and a to b lead to loose of value of a and b
-- we can do this by using temp variable
-- we can do this by using xor operator
-- we can do this by using python technique

directly assigning leads to loose of value
a=5
b=6
a=b
print(a)
6
print(b)
6
a=5 # resign the value of a to 5

use temp variable for swapping
temp=a
a=b
b=temp
print(a)
6
print(b)
5

#without using third variable we can swap the value
a=a+b
b=a-b
a=a-b

print(a)
5
print(b)
6

#use of xor operator for swapping
a=a^b
b=a^b
a=a^b
print(a)
6
print(b)
5

in python we have another technique
a,b=b,a
print(a)
5
print(b)
6

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