C# user entered value in array compare another entered value

Hello,

I am new to learning C# and am self teaching myself, this is not for homework but I want to be able to understand this before I move on in my learning/studies.

Here is my task:

Ask the user to enter 10 numbers and store these in a one dimensional array. Get one additional number from the user and then search the array to see if any of the elements is equal to this additional number. If you find it, display a message that you did and if not display another one that it could not be found.

Here is what I have thus far:

namespace CH7Challenge1

{

class Program

{

static void Main(string[] args)

* Ask the user to enter 10 numbers and store these in a one dimensional array.

* Get one additional number from the user and then search the array to see if any of the elements is equal to this additional number.

* If you find it, display a message that you did and if not display another one that it could not be found.

* */

{

int[] myNums;

myNums = new int[10];

int oneNum;

//Get the ten numbers from the user

Console.WriteLine("Please enter 10 numbers: ");

for (int i = 0; i < 10; i++)

{

Console.Write("Number {0}: ", i + 1);

myNums[i] = int.Parse(Console.ReadLine());

}

//get one additonal number from user

Console.WriteLine("please enter one more number:");

oneNum = int.Parse(Console.ReadLine());

My thought next was to just use an if statement like:

if(myNums[i]==oneNum)

{

Console.WriteLine("Your single number matches a number in the array");

}

else

Console.WriteLine("No match");

However this does not work because i cannot use the user entered value stored in [i] outside of the loop...so I am kind of stumped on how to make this work based on my knowledge thus far.

I appreciate any help from anyone.

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Accepted answer
Try adding this code:

bool found = false;
for(int i = 0; i < 10; i++)
{
if (myNums[i] == oneNum)
{
found = true;
break;
}
}

if (found)
{
Console.WriteLine("Your single number matches a number in the array");
}
else
{
Console.WriteLine("No match");
}
Vulpes13y ago
Incidentally, Mark, you can also use the Array.IndexOf method to check whether an element is present in an array.

If it is, then this method returns the index of the (first) matching element.

If there is no match, it returns -1.

So the code I posted earlier could be shortened to:

int index = Array.IndexOf(myNums, oneNum);

if (index >= 0)
{
Console.WriteLine("Your single number matches a number in the array");
}
else
{
Console.WriteLine("No match");
}
Mark Blankenburg13y ago
Thank you for the solution.
As I read through I think it makes sense as well.