Find a Number in a List

Problem

Given a list of numbers, return the index of the number in the list if it exists. If it does not exist, return -1.
Input: [1, 3, 5, 7, 9]
3
Output: 2

Solution

This solution is in C#. Our A.I. can create solutions in multiple languages.

kayakane

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr = { 1, 3, 5, 7, 9 };
            int num = 3;
            int index = -1;
            for (int i = 0; i < arr.Length; i++)
            {
                if (arr[i] == num)
                {
                    index = i;
                    break;
                }
            }
            Console.WriteLine(index);
            Console.ReadLine();
        }
    }
}