I will
explain in this article how to reverse a given string in a Windows
console application using C# without using a function. This type of
question might be asked by an interviewer in a .Net position related
interview.
In the above program I have clearly explained in comments which statement is used for which purpose. Now run the program with the input string vithal wadje; the output will be as follows:
My
intent for this article is to explain how to answer a question that is
often asked in an interview, which is: Write a program to reverse the
given String without using the string function. A candidate new to the
interview can become totally confused because the first problem is the
candidate just thinks about functions, not other techniques to reverse a
string.
So
considering the preceding requirement and numerous emails sent to me
from beginners I have decided to write this article with the basics and
specially focusing on the beginner, student and whoever might face this
type of question in an interview.
So let us start with the basics.
What is a String ?
A String is a sequence of characters enclosed within double quotation marks.
Example
"vithal wadje" , "C#" , "Mumbai" "Five hundred" etc.
I hope you understand about strings now.
What reversing String Means ?
To change the position of charters from right to left one by one is called reversing a string.
Example
Suppose I have the given input as:
vithal wadje
Then the given string can be reversed into:
ejdaw lahtiv
Now
that we completely understand what is meant by reversing a string, next
I will explain how to do it step-by-step, as in the following:
- Open Visual Studio from Start - - All programs -- Microsoft Visual Studio.
- Then go to to "File" -> "New" -> "Project..." then select Visual C# -> Windows -> Console application.
- After that specify the name such as ReverseString or whatever name you wish and the location of the project and click on the OK button. The new project is created.
using System; namespace ReverseString { class Program { static void Main(string[] args) { string Str, Revstr = ""; //for storing string value int Length; //for counting lenght of given string Console.Write("Enter A String : "); //showing message to user Str = Console.ReadLine(); //to allow user to input string Length = Str.Length - 1; //storing the length of given string while (Length >= 0) //loops the given string length { Revstr = Revstr + Str[Length]; //performimg a reverse string according to length of given string Length--; } Console.WriteLine("Reverse String Is {0}", Revstr); // displaying output to user Console.ReadLine(); // to keep window } } }
Summary
From the all examples above I have explained how to reverse the
string. I hope this article is useful for beginners and anyone preparing for an interview. If you have any suggestions and feedback
please contact me.
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