added new code here

Author: shihabuddin-dev

F. Function/special-problem/admission.js

@@ -0,0 +1,24 @@
+// problem-3
+function willSuccess(marks) {
+    if (!Array.isArray(marks)) {
+        return "Invalid";
+    }
+    let passSubject = 0;
+    let failSubject = 0;
+
+    for (let mark of marks) {
+        if (typeof mark !== 'number') {
+            return "Invalid";
+        }
+        else if (mark >= 50) {
+            passSubject++;
+        }
+        else {
+            failSubject++;
+        }
+    }
+    return passSubject > failSubject;
+}
+const array = 90;
+const result = willSuccess(array);
+console.log(result);

F. Function/special-problem/marriage.js

@@ -0,0 +1,19 @@
+// Problem-4 
+function validProposal(person1, person2) {
+    if (typeof person1 !== 'object' || typeof person2 !== 'object') {
+        return "Invalid";
+    }
+    let person1Age = person1.age;
+    let person2Age = person2.age;
+    let ageDifference = Math.abs(person1Age - person2Age);
+    if (person1.gender !== person2.gender && ageDifference <= 7) {
+        return true;
+    }
+    else {
+        return false;
+    }
+}
+const person1 = { name: "toya", gender: "female", age: 24 };
+const person2 = { name: "bjoy", gender: "male", age: 32 };
+const result = validProposal(person1, person2);
+console.log(result);

F. Function/special-problem/sleep-time.js

@@ -0,0 +1,17 @@
+// Problem-5 
+function calculateSleepTime(times) {
+    let sum = 0;
+    for (let time of times) {
+        sum = sum + time;
+        if (typeof time !== 'number') {
+            return "Invalid";
+        }
+    }
+    let hours = Math.floor(sum / 3600);
+    let minutes = Math.floor((sum % 3600) / 60);
+    let seconds = sum % 60;
+    return { hour: hours, minute: minutes, second: seconds };
+}
+const array = [1000, 499, 519, 300];
+const result = calculateSleepTime(array);
+console.log(result);

F. Function/special-problem/valid-phone-number.js renamed to F. Function/special-problem/valid-phone.js

@@ -1,3 +1,4 @@
+// Problem-2
 function validContact(contact) {
     if (contact.length === 11 && contact.startsWith("01") && !contact.includes(" ")) {
         return true;

F. Function/special-problem/vat-calc.js

@@ -1,3 +1,4 @@
+// Problem-1 
 function calculateVAT(price) {
     if (typeof price !== 'number' || price < 0) {
         return "Invalid";