Iteration

Duration 3 day's
12/9/2023 - 14/9/2023

Author: SaurabhKumarDev

Loop/Assignment.java

@@ -0,0 +1,46 @@
+import java.util.Scanner;
+
+public class Assignment {
+
+    static int fact(int n) {
+        if (n == 0) { return 1; }
+        return n * fact(n-1);
+    }
+
+    static void table(int n) {
+        for (int i=1; i<=10; i++) {
+            System.out.println(n+" * "+i+" = "+(n*i));
+        }
+    }
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+
+        // Question 1
+        for (int i=0; i<5; i++) {
+            System.out.println("Hello");
+            i += 2;         // 0, 3     5<5 false
+        }
+
+        // Question 2
+        //  Prints the sum of the even and odd integers
+        int num = 5;
+        int even = 0, odd = 0;
+        for (int i=1; i<=num; i++) {
+            if (i%2 == 0) {
+                even += i;
+            } else {
+                odd += i;
+            }
+        }
+        System.out.println(even+" "+odd);
+
+        // Question 3
+        // Factorial using function to reduce the complexity
+        System.out.println(fact(num));
+
+        // Question 4
+        // table of N number
+        table(num);
+    }
+}

Loop/ContinueKeyword.java

@@ -0,0 +1,12 @@
+public class ContinueKeyword {
+    public static void main(String[] args) {
+        // dont print 10 ever
+        int num = 19;
+        for (int i=1; i<=num; i++) {
+            if (i == 10) {
+                continue;
+            }
+            System.out.println(i);
+        }
+    }
+}

Loop/MultiplicationOf10.java

@@ -0,0 +1,16 @@
+import java.util.Scanner;
+
+public class MultiplicationOf10 {
+    public static void main(String[] args) {
+        do {
+            Scanner sc = new Scanner(System.in);
+            int num = sc.nextInt();
+
+            if (num%10 == 0) {
+                break;
+            }
+            System.out.println(num);
+
+        } while (true);
+    }
+}

Loop/Prime.java

@@ -0,0 +1,22 @@
+import java.util.Scanner;
+
+public class Prime {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+
+        int num = sc.nextInt();
+        int count = 0;
+
+        for (int i=1; i<num; i++) {
+            if (num%i == 0) {
+                count++;
+            }
+        }
+
+        if (count == 1) {
+            System.out.println("Prime");
+        } else {
+            System.out.println("Not Prime");
+        }
+    }
+}

Loop/PrintNo1to10.java

@@ -0,0 +1,9 @@
+public class PrintNo1to10 {
+    public static void main(String[] args) {
+        int i=1;
+        do {
+            System.out.println(i);
+            i++;
+        } while (i <= 10);
+    }
+}

Loop/PrintNo1toN.java

@@ -0,0 +1,13 @@
+import java.util.Scanner;
+
+public class PrintNo1toN {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+
+        int num = sc.nextInt(), i=1;
+        while (i <= num) {
+            System.out.println(i);
+            i++;
+        }
+    }
+}

Loop/PrintSquarePattern.java

@@ -0,0 +1,14 @@
+public class PrintSquarePattern {
+    public static void main(String[] args) {
+        int n = 4, i=1;
+        while (i <= n) {
+            int j=1;
+            while (j <= n) {
+                System.out.print("*");
+                j++;
+            }
+            i++;
+            System.out.println();
+        }
+    }
+}

Loop/ReverseGivenNumber.java

@@ -0,0 +1,11 @@
+public class ReverseGivenNumber {
+    public static void main(String[] args) {
+        int x = 2345, reverse=0;
+        while (x>0) {
+            int lastDigit = x%10;
+            reverse = (reverse * 10) + lastDigit;
+            x /= 10;
+        }
+        System.out.println(reverse);
+    }
+}

Loop/ReverseOfNumber.java

@@ -0,0 +1,10 @@
+public class ReverseOfNumber {
+    public static void main(String[] args) {
+        int n = 3578;
+        while (n > 0) {
+            int reminder = n%10;
+            System.out.print(reminder);
+            n = n/10;
+        }
+    }
+}

Loop/SumOfFirstNNaturalNum.java

@@ -0,0 +1,13 @@
+import java.util.Scanner;
+
+public class SumOfFirstNNaturalNum {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+
+        int x = sc.nextInt(), sum=0;
+        for (int i=1; i<=x; i++) {
+            sum += i;
+        }
+        System.out.println(sum);
+    }
+}