How to swap values of two variables?
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Daniel Contreras
am 23 Okt. 2017
Kommentiert: lala
am 29 Aug. 2023
For instance, if i ask the user to input the values of a and b, in this case they choose a=10 and b=5 how would I be able to switch them so that it'll be a=5 and b=10.
4 Kommentare
Jan
am 19 Okt. 2021
Bearbeitet: Jan
am 19 Okt. 2021
@Subhashini Neelamegam: Yes, but this is more efficient:
function [b, a] = swap(a, b)
end
Akzeptierte Antwort
David Goodmanson
am 23 Okt. 2017
Hi Daniel,
Take a look at the 'deal' command, in this case [b a] = deal(a,b)
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Weitere Antworten (3)
Jan
am 23 Okt. 2017
Cheaper than deal:
function [b, a] = swap(a, b)
% This function has no body!
13 Kommentare
Rik
am 29 Aug. 2023
You generally need to warm up function calls if you want to test timings online. This should be reasonably stable. As you can see, they differ by a lot, but in the other direction than your post shows. Using a function instead of a script might also affect the timings (as you can see, the same code runs over 10x faster inside a function).
timeit(@test_deal);timeit(@test_swap);% warm-up round
timeit(@test_deal),timeit(@test_swap)
function test_deal
c1 = zeros(100);
c2 = ones(100);
for i = 1:100000
[c1,c2] = deal(c2,c1);
end
end
function test_swap
c1 = zeros(100);
c2 = ones(100);
for i = 1:100000
[c1,c2] = swap(c2,c1);
end
end
function [a,b] = swap(a,b)
end
AAMIR SHEIKH
am 11 Aug. 2020
Going Traditionally !!!
a = input("enter a :::");
b = input("enter b :::");
temp = a;
a = b;
b = temp;
[a b]
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