How do I fix index out of range error message in C#?

Question

Getting an index out of range error message on line 49 "if (myNumber == myPartyAges[i])" I can't figure out why. using Visual studio basic set up here is the code:

List<int> myPartyAges = new List<int>() { 24, 44, 54, 39, 17, 24, 21 };

int myNumber = myPartyAges[5];
bool contains = false;

for (int i = myPartyAges[5] - 1; i >= 1; i--)
{
    if (myNumber == myPartyAges[i])
    {
        contains = true;
        break;
    }
}

if (contains == true)
{
    Console.WriteLine("Number found.");
}
else
{
    Console.WriteLine("Number not found.");
}

use a debugger it will help you understand. Tip watch the value of i on each increment — Harry, Jan 04 '19 at 13:20
`i` starts out as 23. There are only 7 values in `myPartyAges`. — Palle Due, Jan 04 '19 at 13:27
I don't understand what you're talking about. Could you please explain that. I saw that in Vis studio but I didn't know what it meant. — enterjcs, Jan 04 '19 at 13:40

Christoph Sonntag · Answer 1 · 2019-01-04T15:21:27.873

2

Did you mean to do

for (int i = 4; i >= 0; i--)

instead of

for (int i = myPartyAges[5] - 1; i >= 1; i--)

?

edited Jan 04 '19 at 15:21

answered Jan 04 '19 at 13:21

Christoph Sonntag

4,459
1
24
49

I don't want to search the whole length. I want to start at a specific index. – enterjcs Jan 04 '19 at 13:40
Ok you can do this, but not at index 23 like in the code you posted... I changed my code accordingly. – Christoph Sonntag Jan 04 '19 at 15:20

How do I fix index out of range error message in C#?

1 Answers1