lonely-tiger/old_tests/if/elseif

function test(a) {
    if(a == 1) {
        print 10;
    } else if(a == 1) {
        print null;
    } else if(a == 2) {
        print 20;
    } else if(a == 3) {
        print 30;
    } else if(a == 2) {
        print null;
    } else if(a == 4) {
        print 40;
    } else {
        print 50;
    }
}
test(0);
test(1);
test(2);
test(3);
test(4);
test(5);
test(6);