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Arithmetic

Handbook C# · Practical Guide

Calculates sum, difference, product, quotient and remainder. Integer division discards the fractional part; unary +/− sets the sign.

Simple example (Example.cs)

Save this example separately as Example.cs. Run it independently of the other examples on this page.

Example.cs:

// PROJECT-EXAMPLE
System.Console.WriteLine(7 / 2);
double quotient = 7.0 / 2;
System.Console.WriteLine(quotient.ToString(System.Globalization.CultureInfo.InvariantCulture));

Result:

3
3.5

Syntax

left + right / left % right / -value

Example 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        int left = 17, right = 5;
        Console.WriteLine($"{left + right}:{left - right}:{left * right}:{left / right}:{left % right}");
    }
}

Example 2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        double value = 17.0 / 5.0;
        Console.WriteLine($"{+value}:{-value}:{Math.Round(value, 2)}");
    }
}

Official source: Microsoft Learn.