C # nested loop
C # allows you to use another loop within one loop, and here are a few examples to illustrate this concept.
Grammar
Nesting in C # for syntax of the loop statement:
for ( init; condition; increment )
{
for ( init; condition; increment )
{
statement(s);
}
statement(s);
}
Nesting in C # while syntax of the loop statement:
while(condition)
{
while(condition)
{
statement(s);
}
statement(s);
}
Nesting in C # do...while syntax of the loop statement:
do
{
statement(s);
do
{
statement(s);
}while( condition );
}while( condition );
One thing to note about nested loops is that you can nest any other type of loop within any type of loop. For example, a for loops can be nested in while within the cycle, and vice versa.
Example
The following program uses a nested for loop to find prime numbers from2 to 100:
Example
using System;
namespace Loops
{
class Program
{
static void Main(string[] args)
{
/* Definition of Local Variables */
int i, j;
for (i = 2; i < 100; i++)
{
for (j = 2; j <= (i / j); j++)
if ((i % j) == 0) break; // If found, it is not a prime number
if (j > (i / j))
Console.WriteLine("{0} is a prime number", i);
}
Console.ReadLine();
}
}
}
When the above code is compiled and executed, it produces the following results:
2 is a prime number
3 is a prime number
5 is a prime number
7 is a prime number
11 is a prime number
13 is a prime number
17 is a prime number
19 is a prime number
23 is a prime number
29 is a prime number
31 is a prime number
37 is a prime number
41 is a prime number
43 is a prime number
47 is a prime number
53 is a prime number
59 is a prime number
61 is a prime number
67 is a prime number
71 is a prime number
73 is a prime number
79 is a prime number
83 is a prime number
89 is a prime number
97 is a prime number
The prime numbers less than 1000 are:
