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Swapping Characters of a String in C#
To swap characters of a string, use the Select method.
Firstly, let’s say our string is −
string str = "PQRQP";
Now, you need to swap every occurrence of P with Q and Q with P −
str.Select(a=> a == 'P' ? 'Q' : (a=='Q' ? 'P' : a)).ToArray();
The above replaces the characters.
Let us see the compelet code −
Example
using System; using System.Linq; public class Program { public static void Main() { string str = "PQRQP"; var res= str.Select(a=> a == 'P' ? 'Q' : (a=='Q' ? 'P' : a)).ToArray(); str = new String(res); Console.WriteLine(str); } }
Output
QPRPQ
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