Need help

Question

I want to switch two characters in any position of the string.
i.e
input hello
output helol

or
input world
output wolrd

Any characters by just switch their indexes

https://code.sololearn.com/cFCascIEZNVG/?ref=app

Answer 1

The simplest way without use substring etc is get a char array for the word, play with chars and return it as string.

// get the word as a char array
// (which ia not immutable)
char[] a= word.ToCharArray();

// save the first char in a temp var
char t= ca[0];

// replace the second first char with the second
ca[0]= ca[1];

// replace the second char with the temp var (old first char)
ca[1]= t;

// return the char array as string
return new string(ca);