Simple question about c++

[bluesteel]

I wanted to know whether it was possible to write a while where the condition was checked in every instruction and stopped if false, i mean:
Considering the following coda:

condition
instruction 1;
instruction 2;
instruction n;

and it should check whether the condition is true or not in every step. Does something like that exist? I could do as follows:

instruction1;
if(condition)
instruction 2;
else return 0;
instruction 2;

but i am trying to save space and time, is there any way to do that?

[ilikepython]

I wanted to know whether it was possible to write a while where the condition was checked in every instruction and stopped if false, i mean:
Considering the following coda:

condition
instruction 1;
instruction 2;
instruction n;

and it should check whether the condition is true or not in every step. Does something like that exist? I could do as follows:

instruction1;
if(condition)
instruction 2;
else return 0;
instruction 2;

but i am trying to save space and time, is there any way to do that?

You can use a while loop. The syntax is like this:

while (condition){
     //required code here
}
 

That loop will execute until the condition becomes true. After that, the program just continues.
For example:

int num = 0;                        //integer declareation
while (num < 10)               // while loop and condition
{
    cout << num << endl;          // print variable
    num++;                              //increment variable
}
 

That would print out the numbers 0 - 9 because the loop would stop once num > 10.

Hope that helps.