Question answers

src/ASsignment/Question28.java

@@ -69,9 +69,7 @@ public static void bet(int n,int n1,int c){
         int fl=0;
         int simple=0;
 
-       /* do {
-            count+=1;
-        }while(count<=n);*/
+
 
 
         while(count<=n1){

src/ASsignment/Question30.java

@@ -10,12 +10,12 @@ public void fib(int n){
         int fina=0;
         int i=3;
 
-        System.out.println(1);
-        System.out.println(1);
+        System.out.print(1);
+        System.out.print(" "+1);
 
         while(i<=n){
             fina =def+def1;
-            System.out.println(fina);
+            System.out.print(" "+fina);
             def=def1;
             def1=fina;
             i+=1;

src/ASsignment/Question31.java

@@ -0,0 +1,30 @@
+package ASsignment;
+
+import java.util.Scanner;
+
+public class Question31 {
+
+    public void seq(String c){
+        String b="1";
+        int d;
+        System.out.println(b);
+        for (int i=2; i<=c.length();i++){
+             String s=Integer.toString(i);
+            System.out.print(b+i);
+            b= b+s;
+            System.out.println();
+
+        }
+    }
+
+
+    public static void main(String[] args) {
+        Scanner inp= new Scanner(System.in);
+        System.out.println("Enter the number in String");
+        String numbers= inp.next();
+        Question31 obj=new Question31();
+        obj.seq(numbers);
+
+    }
+
+}

src/day10/ArrayDemo1.java

@@ -0,0 +1,28 @@
+package day10;
+
+
+// array index= 0 to size-1
+// arr.length -> gives size of an array
+public class ArrayDemo1 {
+
+    public static void main(String[] args) {
+        //int arr [5]: -> in c and c++
+        // <data type> [] <array name> = new <data type> [size of array]
+
+        int [] arr = new int [3];  // here 3 is size of an array
+        System.out.println(arr); // print object's id (euta proxy class ko)
+        System.out.println(arr[0]); // default value dincha because aile kei assign garya chaina
+        System.out.println(arr[1]); // default value dincha because aile kei assign garya chaina
+        System.out.println(arr[2]); // default value dincha because aile kei assign garya chaina
+        System.out.println(arr.length);
+
+
+
+
+
+    }
+}
+
+
+// array: is a group of elements of same data type
+// arranged in a sequential manner;

src/day10/ArrayDemo10.java

@@ -0,0 +1,11 @@
+package day10;
+
+public class ArrayDemo10 {
+    public static void main(String[] args) {
+        int [] arr= {10,30,34,45};
+
+        for(int a: arr){
+            System.out.println(a);
+        }
+    }
+}

src/day10/ArrayDemo11.java

@@ -0,0 +1,17 @@
+package day10;
+
+public class ArrayDemo11 {
+
+    public static void main(String[] args) {
+        String[][] names = new String[][]{{"ram", "shyam", "hari"}, {"mohan", "gopal", "krishna"}, {"gita", "sita", "rita"}};
+
+        for (String []name : names){
+            for(String n:name){
+                System.out.print(n + " ");
+            }
+            System.out.println();
+        }
+
+
+    }
+}

src/day10/ArrayDemo2.java

@@ -0,0 +1,27 @@
+package day10;
+
+public class ArrayDemo2 {
+
+
+    public static void main(String[] args) {
+
+
+        int [] arr = new int [3];  // here 3 is size of an array
+        System.out.println(arr); // print object's id (euta proxy class ko)
+        System.out.println(arr[0]); // default value dincha because aile kei assign garya chaina
+        System.out.println(arr[1]); // default value dincha because aile kei assign garya chaina
+        System.out.println(arr[2]); // default value dincha because aile kei assign garya chaina
+        System.out.println(arr.length);
+
+        arr[0]=10;
+        arr[1]=20;
+        arr[2]=30;
+        System.out.println(arr[0]);
+        System.out.println(arr[1]);
+        System.out.println(arr[2]);
+
+
+
+
+    }
+}

src/day10/ArrayDemo3.java

@@ -0,0 +1,32 @@
+package day10;
+
+import java.util.Scanner;
+
+public class ArrayDemo3 {
+
+    public static void main(String[] args) {
+        //int arr [5]: -> in c and c++
+        // <data type> [] <array name> = new <data type> [size of array]
+
+        int [] arr = new int [3];  // here 3 is size of an array
+
+        Scanner input = new Scanner((System.in));
+        for(int i=0;i<arr.length;i++){
+            System.out.println("Enter element: ");
+            arr[i]= input.nextInt();
+        }
+      /*  System.out.println(arr[0]);
+        System.out.println(arr[1]);
+        System.out.println(arr[2]);*/
+        int sum=0;
+        for(int i=0; i<arr.length; i++){
+            System.out.println(arr[i]);
+            sum= sum + arr[i];
+        }
+
+        System.out.println("Sum of array elements is: "+sum);
+
+
+
+    }
+}

src/day10/ArrayDemo4.java

@@ -0,0 +1,11 @@
+package day10;
+
+public class ArrayDemo4 {
+
+    public static void main(String[] args) {
+        int [] arr= {10,30,34,45};
+        for(int i=0; i <arr.length; i++){
+            System.out.println(arr[i]);
+        }
+    }
+}

src/day10/ArrayDemo5.java

@@ -0,0 +1,11 @@
+package day10;
+
+public class ArrayDemo5 {
+
+    public static void main(String[] args) {
+        int [] arr= new int [] {32,43,54,12};
+        for(int i=0; i< arr.length;i++){
+            System.out.println(arr[i]);
+        }
+    }
+}

src/day10/ArrayDemo6.java

@@ -0,0 +1,35 @@
+package day10;
+
+import java.util.Scanner;
+
+public class ArrayDemo6 {
+
+    public static void main(String[] args) {
+        final int Rows=3;
+        final int Columns=3;
+
+        int [] [] arr = new int [Rows][Columns];
+        arr[0][0]=10;
+        arr[0][1]=5;
+        arr[0][2]=10;
+        arr[1][0]=10;
+        arr[1][1]=3;
+        arr[1][2]=10;
+        arr[2][0]=10;
+        arr[2][1]=5;
+        arr[2][2]=10;
+
+
+        for (int i=0; i< Rows; i++){
+            for (int j=0; j<Columns;j++){
+                System.out.print(arr[i][j]+" ");
+
+            }
+            System.out.println();
+        }
+    }
+}
+
+// 10 20 34
+// 45 53 23
+// 11 22 37

src/day10/ArrayDemo7.java

@@ -0,0 +1,30 @@
+package day10;
+
+import java.util.Scanner;
+
+public class ArrayDemo7 {
+
+    public static void main(String[] args) {
+        final int Rows=3;
+        final int Columns=3;
+
+        int [] [] arr = new int [Rows][Columns];
+
+        Scanner input = new Scanner((System.in));
+        for (int i=0; i<Rows; i++){
+            for(int j=0; j<Columns;j++){
+                System.out.println("Enter: ");
+                arr[i][j]=input.nextInt();
+            }
+        }
+
+
+        for (int i=0; i< Rows; i++){
+            for (int j=0; j<Columns;j++){
+                System.out.print(arr[i][j]+" ");
+
+            }
+            System.out.println();
+        }
+    }
+}

src/day10/ArrayDemo8.java

@@ -0,0 +1,15 @@
+package day10;
+
+public class ArrayDemo8 {
+
+    public static void main(String[] args) {
+        String [][] names = {{"ram","shyam","hari"},{"mohan","gopal","krishna"},{"gita","sita","rita"}};
+
+    for(int i=0; i < names.length; i++){
+        for (int j=0; j< names.length; j++){
+            System.out.print(names[i][j]+" ");
+        }
+        System.out.println();
+    }
+    }
+}

src/day10/ArrayDemo9.java

@@ -0,0 +1,17 @@
+package day10;
+
+public class ArrayDemo9 {
+
+    public static void main(String[] args) {
+        String[][] names = new String[][]{{"ram", "shyam", "hari"}, {"mohan", "gopal", "krishna"}, {"gita", "sita", "rita"}};
+
+        for (int i = 0; i < names.length; i++) {
+            for (int j = 0; j < names.length; j++) {
+                System.out.print(names[i][j] + " ");
+            }
+            System.out.println();
+        }
+
+
+    }
+}

src/day8/Student.java

@@ -36,6 +36,7 @@ public static void main(String[] args) {
 
         System.out.println("============");
         Student student2=new Student("shyam");
+      //  student2.name="Binit";
 
         student2.displayInfo();
 

src/day9/ThisDemo1.java

@@ -0,0 +1,63 @@
+package day9;
+
+
+// shadowing: is the process of hiding instance variable by local variable
+// inside non static method and constructor of a class
+
+// this is a keyword and is an implicit reference variable of
+// current type and current object
+// and is available inside non-static method and constructor of a class
+// we cannot change the value of 'this';
+
+    public class ThisDemo1 {
+
+    //instance variable
+    int a= 5;
+
+    //yesto ma ni shadowing huncha -> argument ni local variable nai ho tesaile
+    public void m1 (int a){
+        System.out.println(a);
+        System.out.println(this.a);
+    }
+
+    // yesma shadowing hudaina
+   /* public static void a1(){
+        int a=6;
+        ThisDemo1 ob= new ThisDemo1();
+        System.out.println(ob.a);
+
+    }*/
+
+    // shadowing huncha yesma
+    public void print(){
+        System.out.println("this is: "+this);
+        System.out.println(a); // shadow na bhako bela-> this is same as System.out.println(this.a);
+        //local variable
+         a=24;  // -> same as int a =24;
+        System.out.println(a);
+        // paila ko a ko value dincha this garyo bhane
+        System.out.println(this.a);
+        int sum= this.a+a;
+        System.out.println("Sum is: "+sum);
+    }
+
+    // cant do this( static lekhna mildaina)
+   /* public static void print(){
+        System.out.println(a);
+    }*/
+
+    public static void main(String[] args) {
+        ThisDemo1 ob1= new ThisDemo1();
+        System.out.println("Ob1 is: "+ ob1);
+        ob1.print();
+      //  ThisDemo1.a1();
+
+        System.out.println("=========");
+        ThisDemo1 ob2= new ThisDemo1();
+        System.out.println("Ob2 is: "+ ob2);
+        ob2.print();
+
+        ob2.m1(9);
+    }
+
+}