1.11. C # if statement

One if a statement consists of a Boolean expression followed by one or more statements.

1.11.1. Grammar #

In C # if syntax of the statement:

if(boolean_expression)
{
   /* The statement to be executed if the Boolean expression is true */
}

If the Boolean expression is true , the code block within the if statement will be executed. If the Boolean expression is false , the first set of code (after closed parentheses) after the end of the if statement will be executed.

1.11.2. Flow chart #

1.11.3. Example #

using System;
namespace DecisionMaking
{

    class Program
    {
        static void Main(string[] args)
        {
            /* Definition of Local Variables */
            int a = 10;
            /* Check Boolean conditions using if statements */
            if (a < 20)
            {
                /* If the condition is true, output the following statement */
                Console.WriteLine("A less than 20");
            }
            Console.WriteLine("The value of a is {0}", a);
            Console.ReadLine();
        }
    }
}

When the above code is compiled and executed, it produces the following results:

A less than 20
The value of a is 10