In C++ we have 3 basic kinds of loops:

• The "for" loop, used when you know how many times you need to repeat commands.
• The "while" loop, used when you want to check a condition before the commands are executed.
• The "do..while" loop, used when you want to repeat commands until a condition is met.

Mom says you have to eat all your peas before you get dessert.


//while loop
while (peas are still on the plate)
	eat peas;



//do..while loop
do
	eat peas;

while (peas are still on the plate);


//for loop, 3 more big bites!
for(3 bites)
	eat peas;
//////////////////////////////////
#include <iostream.h>

void main()
{
        int x=0; //counter variable

        do
        {

                x=x+2;  //increment x
                cout<<x<<endl;
        } while (x<10);
}            
///////////////////////////////////

#include <iostream.h>

void main()
{

        int x=1;//counter variable

        while (x!=10)//conditional expression
        {
                x=x+2;  //increment x
		cout<<x<<endl;  
        }//compound statement
}       

/////////////////////////////////////
#include <iostream.h>

int main()
{
//counter is the "for loop control variable" and starts at 1
//counter<=3 is the condition under which the loop continues
//counter++ is done at the end of each iteration

        for (int counter=1;counter<=3;counter++)
                cout<<"GMU totally rules!"<<endl;

        return 0;
}        

Note that in the example above, only one statement belongs to the 
loop.  If you wish to repeat more than one statement, the statements
must be bounded by brackets { }.  This is called making a compound
statement.