const marks = [
{ name: "English", mark: 80 },
{ name: "Maths", mark: 100 },
{ name: "Science", mark: 38 },
{ name: "Social", mark: 89 }
];
let isFailed = false;
for (i = marks.length-1; i >=0; i--) {
if (marks[i].mark < 40) {
isFailed = true;
break;
}
}
let isFailed = false;
for (i=0, len=marks.length; i<len; i++) {
if (marks[i].mark < 40) {
isFailed = true;
break;
}
}
const isFailed = marks.some(subject => subject.mark < 40);