Difference b/w Loop

Faisal Ansari

15y3.3kVisual Basic .NET

hello how r u guys ?

Q: what is the difference between for loop and foreach loop?
kindly describe deeply

Thanks.

4 Replies

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Vilas Gite15y ago
hi Faisal just refer below links which describe in deeply...
For Loop: Definition, syntax &used of for loop in various languages
http://en.wikipedia.org/wiki/For_loop

Foreach loop :Definition, syntax &used of foreach loop in various languages
http://en.wikipedia.org/wiki/Foreach_loop
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Sandeep Shekhawat15y ago
class Program
{

static void Main(string[] gaju)
{
int[] a = { 1, 2, 3 };
//it is for loop
for(int i=0;i {
Console.WriteLine(a[i]);
}
Console.WriteLine("----------");
//it is for each loop
foreach(int i in a)
{
Console.WriteLine(i);
}

Console.Read();

}
OutPut:

Bot gives same out put in above code
Vulpes15y ago
The essential difference between the two is that:

A 'for' loop iterates from an initial value to a final value. The 'step' between iterations can be either fixed or variable. The successive values are held in an iteration variable.

A 'foreach' loop iterates over each element of an enumerable collection. The iteration variable holds the actual element.

In both cases, you can terminate the iteration early (using 'break') or skip to the next iteration (using 'continue').

More complex variants of the 'for' statement are possible using multiple iteration variables and it's also possible to define an infinite loop like this:

for(;;){ // code }
Pradeep Chandraker15y ago
Please refer this.

http://support.microsoft.com/kb/129931/en-us?p=1

http://diditwith.net/2006/10/05/PerformanceOfForeachVsListForEach.aspx