console application in c# using System;
namespace cs_console_calculator { class Program {
static void Main(string[] args)
{
double firstnum;
double secnum;
double Answer;
string ops;
Console.WriteLine("console calculator in c#\n");
Console.WriteLine("Enter first number\n");
firstnum = double.Parse(Console.ReadLine());
Console.WriteLine("Select an operator:(+,-,*,/,%)\n");
ops= Console.ReadLine();
Console.WriteLine("Enter Second number\n");
secnum = double.Parse(Console.ReadLine());
if(ops=="+")
{
Answer = firstnum + secnum;
Console.Write(Answer);
}
if (ops == "-")
{
Answer = firstnum - secnum;
Console.Write(Answer);
}
if (ops == "*")
{
Answer = firstnum * secnum;
Console.Write(Answer);
}
if (ops == "/")
{
Answer = firstnum / secnum;
Console.Write(Answer);
}
if (ops == "%")
{
Answer = firstnum % secnum;
Console.Write(Answer);
}
Console.ReadKey();
}
}
}