Comparing an int value to an array, then display if value matches or does not match

Question

I am brand new to programming and was interested in C#. I am studying arrays and have to compare my variable (checkNum) to my array(myNums[10]). I read posts here and several other sites and saw how to compare but getting stuck on how to properly display the comparison as shown in my attempt with the if/else statement below:(I will continue to research, but would appreciate and nudges in the right direction. Not necessarily the answer as I am wanting to learn) :)

Here is my code:

int[] myNums = new int[10];
int checkNum;
Console.WriteLine("Enter 10 numbers:");

for (int i = 0; i < 10; i++)
{
    Console.Write("Number {0}: ", i + 1);
    myNums[i] = int.Parse(Console.ReadLine());
}
Console.WriteLine("You entered:");
foreach (int x in myNums)
{
    Console.Write("{0} ", x);
}
Console.ReadLine();

Console.WriteLine("Enter another number:");
checkNum = int.Parse(Console.ReadLine());
bool exists = myNums.Contains(checkNum);

if (checkNum == myNums[10])
{
    Console.WriteLine("Your number {0} is in the Array.", checkNum);
}
else
{
    Console.WriteLine(
        "Your number {0} does not match any number in the Array.",
        checkNum);
}
Console.ReadLine();

Answer 1

bool exists = myNums.Contains( checkNum );
if( checkNum == myNums[10] )
{
    Console.WriteLine( "Your number {0} is in the Array.", checkNum );
}
else
{
    Console.WriteLine( "Your number {0} does not match any number in the Array.", checkNum );
}

Should be

bool exists = myNums.Contains( checkNum );
// or simply if(myNums.Contains(checkNum)) as you don't use the variable again
if( exists )
{
    Console.WriteLine( "Your number {0} is in the Array.", checkNum );
}
else
{
    Console.WriteLine( "Your number {0} does not match any number in the Array.", checkNum );
}

You perform the check correctly, but you don't use the result (exists) and simply (attempt to) compare the new number to the last element in the array. Of course, at this point your program just crashes because you have overrun the bounds of your array.

Arrays are 0 indexed, i.e., nums[10] contains indices 0-9.