"Another common use case for a while loop is a flag-controlled loop in which we use a Boolean flag rather than an expression to determine if a loop should continue or not. Recall that in C, zero is treated as false and any non-zero numeric value is treated as true. We can thus create an implicit Boolean flag by using an integer variable and setting it to 1 for true and 0 for false (when we want the loop to terminate). An example can be found in Code Sample 17.2.\n\n1 int i = 1;\n\n2 int flag = 1;\n\n3 while(flag) {\n\n4 //perform some action\n\n5 i++; //iteration\n\n6 if(i>10) {\n\n7 flag = 0;\n\n8 }\n\n9 }\n\nCode Sample 17.2.: Flag-controlled While Loop in C"