Error that i cant understand in c#

Question

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

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Please put in number that you want to convert");
double number =
Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Number 1: feet to cm. Number 2: cm to feet");
System.Threading.Thread.Sleep(10000);
int select =
Convert.ToInt32(Console.ReadLine());
if(select = 1)
Console.WriteLine(number * 30);
else
Console.WriteLine(number / 30);
}
}
}
this code gives me a error. i dont know why it does

Answer 1

You write a mistake:
if(select=1)
you should use == instead of =