class Ideone {
static void main(String[] args) {
println("Enter numbers, 42 to exit:")
for (n in System.in.readLines()) {
if (n != "42") {
println(n);
} else {
break;
}
}
}
}
/*
run:
STDIN
4
6
8
0
2910
42
Output:
Enter numbers, 42 to exit:
4
6
8
0
2910
*/