Q.1: How to reverse a string?

 Ans.: The user will input a string and the method should return the reverse of that string

• input: hello, output: olleh
• input: hello world, output: dlrow olleh

internal static void ReverseString(string str)

{

char[] charArray = str.ToCharArray();

for (int i = 0, j = str.Length - 1; i < j; i++, j--)

{

charArray[i] = str[j];

charArray[j] = str[i];

}

string reversedstring = new string(charArray);

Console.WriteLine(reversedstring);

}