??? Undefined function or variable 'swap'.

function [y,x]=swap(x,y)

[ishan s]

if anyone can guide me i would be thankful

Answer 1

[Stephen23]

There is no need to write your own function: if you want to swap variables, then you can use the inbuilt deal function to do exactly this:

>> X = 3;
>> Y = 2;
>> [Y,X] = deal(X,Y)
Y =
   3
X =
   2

It even works for multiple arguments!

Answer 2

[Walter Roberson]

function [y,x]=swap(x,y)
end

is the entire code. To use it, for example,

a = 5; b = 48;
[a,b] = swap(a,b)

Answer 3

[ishan s]

thank you it works perfectly