C#: Determine the sign of a single value and display it to the console

Last update on August 25 2025 12:48:55 (UTC/GMT +8 hours)

Write a C# Sharp program to determine the sign of a single value and display it on the console.

A number that indicates the sign of value, as shown in the following table.

Sample Solution:

C# Sharp Code:

using System;
using System.Text;
namespace exercises {
  class Program {
    public static void Main() {
      string str = "{0}: {1,3} is {2} zero.";
      string nl = Environment.NewLine;
      byte xByte1 = 0;
      short xShort1 = -2;
      int xInt1 = -3;
      long xLong1 = -4;
      float xSingle1 = 2.10f;
      double xDouble1 = 6.0;
      Decimal xDecimal1 = -7m;
      Console.WriteLine($"{nl}Test the sign of the following types of values:");
      Console.WriteLine(str, "Byte   ", xByte1, Test(Math.Sign(xByte1)));
      Console.WriteLine(str, "Int16  ", xShort1, Test(Math.Sign(xShort1)));
      Console.WriteLine(str, "Int32  ", xInt1, Test(Math.Sign(xInt1)));
      Console.WriteLine(str, "Int64  ", xLong1, Test(Math.Sign(xLong1)));
      Console.WriteLine(str, "Single ", xSingle1, Test(Math.Sign(xSingle1)));
      Console.WriteLine(str, "Double ", xDouble1, Test(Math.Sign(xDouble1)));
      Console.WriteLine(str, "Decimal", xDecimal1, Test(Math.Sign(xDecimal1)));
    }
    public static string Test(int compare) {
      if (compare == 0)
        return "equal to";
      else if (compare < 0)
        return "less than";
      else
        return "greater than";
    }
  }
}

Sample Output:

Test the sign of the following types of values:
Byte   :   0 is equal to zero.
Int16  :  -2 is less than zero.
Int32  :  -3 is less than zero.
Int64  :  -4 is less than zero.
Single : 2.1 is greater than zero.
Double :   6 is greater than zero.
Decimal:  -7 is less than zero.

Flowchart:

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C# Sharp Code Editor:

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