1. Introduction
  2. Lesson 1: Getting Started with C#
  3. Lesson 2: Operators, Types, and Variables
    1. Variables and Types
    2. The Boolean Type
    3. Integral Types
    4. Floating Point and Decimal Types
    5. The string Type
    6. Escape Sequences
    7. C# Operators
    8. The Array Type
    9. Summary
  4. Lesson 3: Control Statements - Selection
    1. The if Statement
    2. The if-else statement
    3. The switch Statement
    4. Branching Statements
  5. Lesson 4: Control Statements - Loops
    1. The while Loop
    2. The do while Loop
    3. The for Loop
    4. The foreach Loop
  6. Lesson 5: Methods
    1. Method Structure
  7. Lesson 6: Namespaces
    1. Namespace Declaration
  8. Lesson 7: Introduction to Classes
    1. Classes
  9. Lesson 8: Class Inheritance
  10. Lesson 9: Polymorphism
    1. Polymorphism
  11. Lesson 10: Properties
    1. Overview of Properties
    2. Creating Auto-Implemented Properties
    3. Creating a Write-Only Property
    4. Creating Read-Only Properties
    5. Encapsulating Type State with Properties
    6. Traditional Encapsulation Without Properties
  12. Lesson 11: Indexers
    1. Indexers
    2. Overloaded Indexers
  13. Inheritance

4.2.The if-else statement #

An if-else statement allows you to take a multiple selection, when the boolean expression checking true, the statement(s) in the block immediately following the if statement are executed. However, when the boolean expression checking false, the statements in the block following the else keyword are executed.

Listing 3-1:

using System;

namespace CSharp
{
        class if_else_Selection
        {
                static void Main(string[] args)
                {
                        float score;
                        Console.Write("Enter Score: ");
                        score = float.Parse(Console.ReadLine());
                        if (score >= 50)
                                Console.WriteLine("Passed");
                        else
                                Console.WriteLine("Failed");
                        Console.ReadKey();
                }
        }
}

Example 1: Windows Forms Application:

Example 2: Windows Forms Application: (More than two conditions)

Yes No Suggest edit
« The if StatementThe switch Statement »
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