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The * operator in Java is used to multiply two numbers. Read required numbers from the user using Scanner class and multiply these two integers using the * operator.Exampleimport java.util.Scanner; public class MultiplicationOfTwoNumbers { public static void main(String args[]){ Scanner sc = new Scanner(System.in); System.out.println("Enter the value of the first number ::"); int a = sc.nextInt(); System.out.println("Enter the value of the first number ::"); int b = sc.nextInt(); int result = a*b; System.out.println("Product of the given two numbers ... Read More
To count the occurrence of each character in a string using Hashmap, the Java code is as follows −Example Live Demoimport java.io.*; import java.util.*; public class Demo{ static void count_characters(String input_str){ HashMap my_map = new HashMap(); char[] str_array = input_str.toCharArray(); for (char c : str_array){ if (my_map.containsKey(c)){ my_map.put(c, my_map.get(c) + 1); }else{ my_map.put(c, 1); } } for (Map.Entry entry : my_map.entrySet()){ ... Read More
To locate a character in a string, use the indexOf() method.Let’s say the following is our string.String str = "testdemo";Find a character ‘d’ in a string and get the index.int index = str.indexOf( 'd');Example Live Demopublic class Demo { public static void main(String []args) { String str = "testdemo"; System.out.println("String: "+str); int index = str.indexOf( 'd' ); System.out.printf("'d' is at index %d, index); } }OutputString: testdemo 'd' is at index 4Let us see another example. The method returns -1, if the character isn’t found −Example Live Demopublic class ... Read More
To find the 2nd smallest element of the given array, first of all, sort the array.Sorting an arrayCompare the first two elements of the arrayIf the first element is greater than the second swap them.Then, compare 2nd and 3rd elements if the second element is greater than the 3rd swap them.Repeat this till the end of the array.After sorting an array print the 2nd element of the array.ExampleLive Demopublic class SmallestNumberInAnArray { public static void main(String args[]){ int temp, size; int array[] = {10, 20, 25, 63, 96, 57}; size = array.length; for(int i = 0; i
The Set object provides a method known as toArray(). This method accepts an empty array as argument, converts the current Set to an array and places in the given array. To convert a Set object to an array − Create a Set object. Add elements to it. Create an empty array with size of the created Set. Convert the Set to an array using the toArray() method, bypassing the above-created array as an argument to it. Print the contents of the array.ExampleLive Demoimport java.util.HashSet; import java.util.Set; public class SetToArray { public static void main(String args[]){ Set set = new HashSet(); ... Read More
Storage classes specify the scope, lifetime and binding of variables.To fully define a variable, one needs to mention not only its ‘type’ but also its storage class.A variable name identifies some physical location within computer memory, where a collection of bits are allocated for storing values of variable.Storage class tells us the following factors −Where the variable is stored (in memory or cpu register)?What will be the initial value of variable, if nothing is initialized?What is the scope of variable (where it can be accessed)?What is the life of a variable?BindingBinding finds the corresponding binding occurrence (declaration/definition) for an applied ... Read More
We know that functions can be called by value and called by reference.If the actual parameter should not change in called function, pass the parameter-by value.If the value of actual parameter should get changed in called function, then use pass-by reference.If the function has to return more than one value, return these values indirectly by using call-by-reference. Read Also: Function Call by Value in C and Function Call by Reference in C ExampleFollowing is the C program for the demonstration of returning the multiple values − Live Demo#include void main() { void areaperi(int, int*, int*); int r; float ... Read More
Data structure is collection of data organized in a structured way. It is divided into two types as explained below − Linear data structure − Data is organized in a linear fashion. For example, arrays, structures, stacks, queues, linked lists. Nonlinear data structure − Data is organized in a hierarchical way. For example, Trees, graphs, sets, tables. Read Also: Data Structures and Types Queue Queue is a linear data structure, where the insertion is done at rear end ... Read More
Data structure is collection of data organized in a structured way. It is divided into two types as explained below −Linear data structure − Data is organized in a linear fashion. For example, arrays, structures, stacks, queues, linked lists.Nonlinear data structure − Data is organized in a hierarchical way. For example, Trees, graphs, sets, tables. Also Read: Data Structures and Types Queue Queue is a linear data structure, where the insertion is done at rear end and the deletion is done at the front end.The order of queue is FIFO – First In First OutOperationsInsert – Inserting an element into ... Read More
Problem Statement Given a binary number, you have to write a C program to find 2'c complements for given binary number. Consider an example given below −ExampleThe input is as follows:Enter a binary number:10010001The output is as follows:1's complement of 10010001 is 011011102's complement of 10010001 is 01101111AlgorithmRefer an algorithm to find 2’c complements for a given binary number.Step 1 − Start.Step 2 − Read the binary number at runtime.Step 3 − Copy the binary number to strdp.Step 4 − len: = strlen(str)Step 5 − For i = 0 to len-1 do Step 5.1 − if str[i] == ‘1’ ... Read More