if...else Statement

if...else Statement

 An if statement can be followed by an optional else statement, which executes when the boolean expression is false.
Syntax The syntax of an if...else statement in C# ,c,++ is:
if(boolean_expression)
{
   /* statement(s) will execute if the boolean expression is true */
}
else
{
  /* statement(s) will execute if the boolean expression is false */
}

example

using System; 

namespace DecisionMaking 

{ 

     

    class Program 

    { 

        static void Main(string[] args) 

        { 

            /* local variable definition */ 

            int a = 100;  

            /* check the boolean condition */ 

            if (a < 20) 

            { 

                /* if condition is true then print the following */ 

                Console.WriteLine("a is less than 20"); 

            } 

            else 

            { 

                /* if condition is false then print the following */ 

                Console.WriteLine("a is not less than 20"); 

            } 

            Console.WriteLine("value of a is : {0}", a); 

            Console.ReadLine(); 

        } 

    } 

}