First 3 Questions' Solutions of Assignment-1

session_1/solution/question_1.dart

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+//Printing First N Fibonacci Numbers
+
+import 'dart:io';
+
+void fibo(int n) {
+  int a = 0, b = 1;
+  int c = a + b;
+  print(a);
+  print(b);
+  print(c);
+
+  for (int i = 4; i <= n; i++) {
+    a = b;
+    b = c;
+    c = a + b;
+    print(c);
+  }
+}
+
+void main() {
+  print('Please enter a value for n: ');
+  int? n = int.parse(stdin.readLineSync()!);
+  print('This is the corresponding Fibonacci Series:');
+  fibo(n);
+}

session_1/solution/question_2.dart

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+//Checking if the given number is a Semiprime or not
+
+import 'dart:io';
+
+bool prime(int n) {
+  if (n == 1) return false;
+  for (int i = 2; i < n; i++) {
+    if (n % i == 0) return false;
+  }
+  return true;
+}
+
+bool sempr(int n) {
+  if (prime(n)) return false;
+  for (int i = 2; i < n; i++) {
+    if (n % i == 0) {
+      if (!(prime(i)))
+        return false;
+      else if (!(prime((n / i).floor()))) return false;
+    }
+  }
+  return true;
+}
+
+void main() {
+  print('Please enter a value for n: ');
+  int? n = int.parse(stdin.readLineSync()!);
+  if (sempr(n))
+    print('${n} is a SemiPrime Number');
+  else
+    print('${n} is not a SemiPrime Number');
+}

session_1/solution/question_3.dart

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+// Checking whether the sum of prime elements of the array is prime or not
+
+import 'dart:io';
+
+bool prime(int n) {
+  if (n == 1) return false;
+
+  for (int i = 2; i < n; i++) {
+    if (n % i == 0) return false;
+  }
+  return true;
+}
+
+void main() {
+  print('Please enter the number of values in the List: ');
+  int? siz = int.parse(stdin.readLineSync()!);
+  var ary = [];
+
+  for (int i = 0; i < siz; i++) {
+    int? k = int.parse(stdin.readLineSync()!);
+    ary.add(k);
+  }
+
+  int sum = 0;
+  for (int i = 0; i < siz; i++) {
+    if (prime(ary[i])) {
+      int k = ary[i];
+      sum += k;
+    }
+  }
+
+  if (prime(sum))
+    print('The Sum of Prime Elements of the entered array is PRIME!');
+  else
+    print('The Sum of Prime Elements of the entered array is NOT PRIME!');
+}