Calculations

Explanation for Remainder Of Division

Let's start with a program that reads width and height of a rectangle and prints it's area.

using System; namespace csharp { class Program { static void Main(string[] args) { double width = Double.Parse(Console.ReadLine()); double height = Double.Parse(Console.ReadLine()); // Calc Area: double area = width * height; Console.WriteLine("Area = " + area); } } }

Input:

3 2

Output:

Area = 6

Explanation

• At line 9 and 10 width and height are red.
• Double.Parse is used to convert the string input to double.
• At line 13 width and height are multiplied (via * operator).

Let's demonstrate the rest of the operators:

using System; namespace csharp { class Program { static void Main(string[] args) { // Read inputs: int a = int.Parse(Console.ReadLine()); int b = int.Parse(Console.ReadLine()); Console.WriteLine("A = " + a); Console.WriteLine("B = " + b); Console.WriteLine(); Console.WriteLine("A + B = " + (a + b)); Console.WriteLine("A - B = " + (a - b)); Console.WriteLine("A * B = " + (a * b)); Console.WriteLine(); Console.WriteLine("Remainder of Division:" + (a % b)); Console.WriteLine(); Console.WriteLine("Concating strings: "); string str1 = "Web "; string str2 = "Technologies"; Console.WriteLine(str1 + str2); string numericStr1 = "1"; string numericStr2 = "2"; Console.WriteLine("1 + 2 = " + numericStr1 + numericStr2); } } }

Input:

5 2

Output:

A = 5 B = 2 A + B = 7 A - B = 3 A * B = 10 Remainder of Division:1 Concat strings: Web Technologies 1 + 2 = 12

Notice that + operator can be applied to both numeric and string variables.