{{keywords>wiki library source code example reference}}
===== while =====
<code cpp>    
    #include <iostream> /* including standard library */

    while ( condition == true ) {
    do something until condition untrue
    }
</code>

===== cpp Sourcecode Example =====
<code cpp>

#include <iostream> /* including standard library */

using namespace std;
int main(void) {
    int i=0;
    
    while (i <= 99) {
        cout << i << endl;
        i++;
    }
    return 0;
}
</code>

    //output://
    
    0
    1
    2
    3
    4
    5
    6
    7
    ...
    up to 99