while loop c 2b 2b

1do {
2   // codes;
3}
4while (testExpression);

1while (true) { // you can also put 1 or true: while (1)
2	//do stuff
3}

1while (test_expression)
2{
3   // statements
4 
5  update_expression;
6}

1while (x != 0){ ... }

1do
2{
3   statement(s);
4} while(condition);

1//Executes a statement repeatedly, until the value of condition becomes false.
2//The test takes place before each iteration
3while(condition) {
4  statement
5}