Saturday, 25 January 2014

Loop in C#

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A loop statement allows us to execute a statement or group of statements multiple times and following is the general from of a loop statement in most of the programming languages:
For brief knowledge about different types of loop click on the link given in table.
Loop Architecture
C# provides following types of loop to handle looping requirements. Click the following links to check their detail.
Loop TypeDescription
while loop (click here)Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.
for loop  (click here)Executes a sequence of statements multiple times and abbreviates the code that manages the loop variable.
do...while loop  (click here)Like a while statement, except that it tests the condition at the end of the loop body
nested loops  (click here)You can use one or more loop inside any another while, for or do..while loop.

Loop Control Statements:

Loop control statements change execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed.
C# provides the following control statements. Click the following links to check their details.
Control StatementDescription
break statement (click here)Terminates the loop or switch statement and transfers execution to the statement immediately following the loop or switch.
continue statement (click here)Causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating.

The Infinite Loop:

A loop becomes infinite loop if a condition never becomes false. The for loop is traditionally used for this purpose. Since none of the three expressions that form the for loop are required, you can make an endless loop by leaving the conditional expression empty.
using System;

namespace Loops
{
    
    class Program
    {
        static void Main(string[] args)
        {
            for (; ; )
            {
                Console.WriteLine("Hey! I am Trapped");
            }
 
        }
    }
} 
When the conditional expression is absent, it is assumed to be true. You may have an initialization and increment expression, but programmers more commonly use the for(;;) construct to signify an infinite loop.

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