Vishakha Umale

 Add items in shopping cart: We are using ArrayList Code: import java.util.*; public class Main {  public static void main (String[]args)   {     ArrayList < String > items = new ArrayList < String > ();     Scanner sc = new Scanner (System.in);       items.add ("folder");       items.add ("flower");       items.add ("Car");       items.add ("Bottle");       items.add ("Mask");       items.add ("Box");       System.out.println ("Shopping card items");       System.out.print (items);       System.out.println ("Enter item which you want:");       String rmv = sc.nextLine ();       items.remove (rmv);       System.out.println ("Shopping card items");       System.out.print (items);   } } Output: Shopping card items                                                                                                              [folder, flower, Car, Bottle, Mask, Box]Enter item which you want: 

 Count-ways-reach-nth-stair-using-step-1-2 Code:     public class Main{     static int fib(int n)     {         if(n<=1)         return n;        return fib(n-1)+fib(n-2);     }     static int ways(int n)     {         return fib(n+1);     } public static void main(String[] args) { System.out.println("count-ways-reach-nth-stair-using-step-1-2:"+ways(8)); } } Output:  count-ways-reach-nth-stair-using-step-1-2:8   #tcs nqt question count-ways-reach-nth-stair-using-step-1-2:8

Find number is present in Array or Not // Java code  import  java.util.*; class   A  {      static   boolean   exists ( int []  ints ,  int   k ) {          boolean   found = false ;          for ( int   n : ints){              if (n==k){                 found= true ;                  break ;             }         }          return  found;     }      public   static   void   main ( String []  args ){          int []  ints ={- 9 , 14 , 37 , 102 };          System . out . print ( "Enter num:" );          Scanner   s = new   Scanner ( System . in );          int   k = s . nextInt ();          System . out . println ( "Number exist:" + exists (ints,k));     } }

  Fibonacci series Code: import java.util.Scanner; class Main{     public static void main(String anyVar[]){         Scanner sc=new Scanner(System.in);         System.out.println("Enter any number till that yu want Fibonacci series:");         int num=sc.nextInt();         System.out.println("Fibonacci series till "+num+"is as follows:");         int num1=1,num2=1,num3=0;         for(int i=0;i<num;i++){            if(i==0||i==1)             System.out.print(1);             else{                 //Fibonacci number is sum of previous two Fibonacci number                 num3=num1+num2;                 num1=num2;                 num2=num3;                                  System.out.print(" "+num3);             }                     }      } Output: Enter any number till that yu want Fibonacci series:                                                                           12                                                                       

  Array:  1.String array class Main{ /*Every application in Java must contain the main method. The Java compiler starts executing the code from the main method*/     public static void main(String anyVar[]){                  String [] array={"1","2","3"};          System.out.println("default values of string array:"+array);          System.out.println("values for string array\nstring array[0]:"+array[0]+"\nstring array[1]:"+array[1]+     "\nstring array[2]:"+array[2]);      } Output: default values of string array:[Ljava.lang.String;@2a139a55                                                                    values for string array                                                                                                        string array[0]:1                                                                                                              string array[1]:2                                           

Array:  1.int array class Main{ /*Every application in Java must contain the main method. The Java compiler starts executing the code from the main method*/     public static void main(String anyVar[]){                  int [] array={1,2,3};          System.out.println("default values of int array:"+array);          System.out.println("values for int array\nint array[0]:"+array[0]+"\nint array[1]:"+array[1]+"\nint array[2]:"+array[2]);      } Output: default values of int array:[I@2a139a55                                                                                        values for int array                                                                                                           int array[0]:1                                                                                                                 int array[1]:2                                                                                                              

  Simple java code class Main{ /*Every application in Java must contain the main method. The Java compiler starts executing the code from the main method*/      public static void main(String anyVar[]){      System.out.println("Simple java code");       } } Output: Simple java code Screenshot: Online compiler:https://www.onlinegdb.com/online_java_compiler #happyCoding💁👍