Fundamentals

This C# program demonstrates how to use some of the fundamental mathematics functions and constants in C#.

Program.cs

using System;

namespace XoaX {
    class Program {
        static void Main(string[] args) {
            int iA = 287;
            int iD = 31;
            int iQ = 0;
            int iR = Math.DivRem(iA, iD, out iQ);
            Console.WriteLine("The division algorithm:");
            Console.WriteLine(iA + " = " + iQ + "*" + iD + " + " + iR);
            Console.WriteLine();

            int iLarge1 = 0x7fffffff;
            int iLarge2 = 0x7fffffff;
            long lProduct = Math.BigMul(iLarge1, iLarge2);
            Console.WriteLine("Large multiplication with no overflow:");
            Console.WriteLine(iLarge1 + " * " + iLarge2 + " = " + lProduct);
            Console.WriteLine();

            double dX = 7.0;
            Console.WriteLine("Logarithms:");
            Console.WriteLine("The natural log of " + dX + " is " + Math.Log(dX));
            Console.WriteLine("The log base 2 of " + dX + " is " + Math.Log(dX, 2.0));
            Console.WriteLine("The log base 10 of " + dX + " is " + Math.Log10(dX));
            Console.WriteLine();

            double dA = 37.2;
            double dD = 5.7;
            double dR = Math.IEEERemainder(dA, dD);
            Console.WriteLine("Remainder:");
            Console.WriteLine("The remainder of " + dA + " and " + dD + " is " + dR);
            Console.WriteLine();

            double dB = 2.5;
            double dPow = 4.3;
            Console.WriteLine("The exponential and power functions:");
            Console.WriteLine("The exponential of " + dB + " is " + Math.Exp(dB));
            Console.WriteLine(dB + " to the power " + dPow + " is " + Math.Pow(dB, dPow));
            Console.WriteLine();

            double dY = 8.1;
            Console.WriteLine("The sqrt function:");
            Console.WriteLine("The square root of " + dY + " is " + Math.Sqrt(dY));
            Console.WriteLine();

            Console.WriteLine("Constants");
            Console.WriteLine("The value of pi is " + Math.PI);
            Console.WriteLine("The value of e is " + Math.E);
        }
    }
}

Output

The division algorithm:
287 = 8*31 + 9

Large multiplication with no overflow:
2147483647 * 2147483647 = 4611686014132420609

Logarithms:
The natural log of 7 is 1.94591014905531
The log base 2 of 7 is 2.8073549220576
The log base 10 of 7 is 0.845098040014257

Remainder:
The remainder of 37.2 and 5.7 is -2.7

The exponential and power functions:
The exponential of 2.5 is 12.1824939607035
2.5 to the power 4.3 is 51.4211798568061

The sqrt function:
The square root of 8.1 is 2.84604989415154

Constants
The value of pi is 3.14159265358979
The value of e is 2.71828182845905
Press any key to continue . . .