Chapter 7 Practice Set Solutions

Author: kishanrajput23

35.Chapter_7_Practice_Set/Chapter7_PracticeSet.pdf

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+public class cwh_35_ps_pr_01 {
+    static void multiplication(int n) {
+        for (int i=1; i<=10; i++) {
+        System.out.println(n + " * " + i + " = " + (n*i));
+      }
+    }
+    public static void main(String args[]) {
+        multiplication(9);
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_01.java

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+public class cwh_35_ps_pr_02 {
+    static void pattern(int n) {
+        for (int i = 0; i < n; i++) {
+            for (int j = 0; j < i + 1; j++) {
+                System.out.print("* ");
+            }
+            System.out.println();
+        }
+    }
+    public static void main(String args[]) {
+        pattern(4);
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_02.java

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+public class cwh_35_ps_pr_03 {
+    static int recursive_sum(int n) {
+        if (n==1) {
+            return 1;
+        }
+        else {
+            return n + recursive_sum(n-1);
+        }
+        
+    }
+    public static void main(String args[]) {
+        System.out.println(recursive_sum(5));
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_03.java

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+public class cwh_35_ps_pr_04 {
+    static void pattern(int n) {
+        for (int i = n; i > 0; i--) {
+            for (int j = 0; j < i; j++) {
+                System.out.print("* ");
+            }
+            System.out.println();
+        }
+    }
+    public static void main(String args[]) {
+        pattern(5);
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_04.java

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+public class cwh_35_ps_pr_05 {
+    static int fibonacci(int n) {
+        if ( n==1 || n == 2) {
+            return (n-1);
+        }
+        else {
+            return (fibonacci(n-1) + fibonacci(n-2));
+        }
+    }
+    public static void main(String args[]) {
+        System.out.println(fibonacci(5));
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_05.java

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+public class cwh_35_ps_pr_06 {
+    static int avg(int ...arr) {
+        int len = arr.length;
+        int sum = 0;
+        for (int element:arr) {
+            sum += element;
+        }
+        int average = sum / len;
+        return average;
+    }
+    public static void main(String args[]) {
+        System.out.println(avg(1,2,3,4,5,34,564,234));
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_06.java

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+public class cwh_35_ps_pr_07 {
+    static void pattern_rec(int n) {
+        if (n > 0) {
+            for (int i = 0; i < n; i++) {
+                System.out.print("*");
+            }
+            System.out.println();
+            pattern_rec(n - 1);
+        }
+        
+    }
+    public static void main(String args[]) {
+        pattern_rec(5);
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_07.java

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+public class cwh_35_ps_pr_08 {
+    static void pattern_rec(int n) {
+        if (n > 0) {
+            pattern_rec(n - 1);
+            for (int i = 0; i < n; i++) {
+                System.out.print("*");
+            }
+            System.out.println();
+        }
+    }
+    public static void main(String args[]) {
+        pattern_rec(5);
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_08.java

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+public class cwh_35_ps_pr_09 {
+    static float cel_to_feh(float n) {
+        float temp = n * (9/5f) + 32;
+        return temp;
+    }
+    public static void main(String args[]) {
+        System.out.println(cel_to_feh(100.5f));
+    }
+}

35.Chapter_7_Practice_Set/cwh_35_ps_pr_09.java

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+public class cwh_35_ps_pr_10 {
+    static int sum(int n) {
+        int sum = 0;
+        for (int i=1; i<=n; i++) {
+            sum += i;
+        }
+        return sum;
+    }
+    public static void main(String args[]) {
+        System.out.println(sum(5));
+    }
+}